120101011012021 has 4 divisors (see below), whose sum is σ = 129339550320652. Its totient is φ = 110862471703392.

The previous prime is 120101011012009. The next prime is 120101011012027. The reversal of 120101011012021 is 120210110101021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44287507672996 + 75813503339025 = 6654886^2 + 8707095^2 .

It is a cyclic number.

It is not a de Polignac number, because 120101011012021 - 2⁷ = 120101011011893 is a prime.

It is a super-2 number, since 2×120101011012021² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 9238539308617 = 120101011012021 / (1 + 2 + 0 + 1 + 0 + 1 + 0 + 1 + 1 + 0 + 1 + 2 + 0 + 2 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120101011011992 and 120101011012010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120101011012027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4619269654296 + ... + 4619269654321.

It is an arithmetic number, because the mean of its divisors is an integer number (32334887580163).

Almost surely, 2^{120101011012021} is an apocalyptic number.

It is an amenable number.

120101011012021 is a deficient number, since it is larger than the sum of its proper divisors (9238539308631).

120101011012021 is an equidigital number, since it uses as much as digits as its factorization.

120101011012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9238539308630.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 120101011012021 its reverse (120210110101021), we get a palindrome (240311121113042).

The spelling of 120101011012021 in words is "one hundred twenty trillion, one hundred one billion, eleven million, twelve thousand, twenty-one".