120211112122021 has 4 divisors (see below), whose sum is σ = 120727039642092. Its totient is φ = 119695184601952.

The previous prime is 120211112121929. The next prime is 120211112122037. The reversal of 120211112122021 is 120221211112021.

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 16298063371396 + 103913048750625 = 4037086^2 + 10193775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120211112122021 is a prime.

It is a super-2 number, since 2×120211112122021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120211112122021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120211112122091) 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, 257963759686 + ... + 257963760151.

It is an arithmetic number, because the mean of its divisors is an integer number (30181759910523).

Almost surely, 2^{120211112122021} is an apocalyptic number.

It is an amenable number.

120211112122021 is a deficient number, since it is larger than the sum of its proper divisors (515927520071).

120211112122021 is an equidigital number, since it uses as much as digits as its factorization.

120211112122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515927520070.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 120211112122021 its reverse (120221211112021), we get a palindrome (240432323234042).

The spelling of 120211112122021 in words is "one hundred twenty trillion, two hundred eleven billion, one hundred twelve million, one hundred twenty-two thousand, twenty-one".