120101021021 has 4 divisors (see below), whose sum is σ = 120101797500. Its totient is φ = 120100244544.

The previous prime is 120101020951. The next prime is 120101021057. The reversal of 120101021021 is 120120101021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 120120101021 = 29 ⋅4142072449.

It can be written as a sum of positive squares in 2 ways, for example, as 2219352100 + 117881668921 = 47110^2 + 343339^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120101021021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120101020993 and 120101021011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120101021321) 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, 68396 + ... + 494853.

It is an arithmetic number, because the mean of its divisors is an integer number (30025449375).

Almost surely, 2^120101021021 is an apocalyptic number.

It is an amenable number.

120101021021 is a deficient number, since it is larger than the sum of its proper divisors (776479).

120101021021 is an equidigital number, since it uses as much as digits as its factorization.

120101021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776478.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 120101021021 its reverse (120120101021), we get a palindrome (240221122042).

The spelling of 120101021021 in words is "one hundred twenty billion, one hundred one million, twenty-one thousand, twenty-one".