120111112012021 has 4 divisors (see below), whose sum is σ = 129350428320652. Its totient is φ = 110871795703392.

The previous prime is 120111112011983. The next prime is 120111112012069. The reversal of 120111112012021 is 120210211111021.

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 53645165409796 + 66465946602225 = 7324286^2 + 8152665^2 .

It is a cyclic number.

It is not a de Polignac number, because 120111112012021 - 2¹⁵ = 120111111979253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120111112011986 and 120111112012004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120111112012721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4619658154296 + ... + 4619658154321.

It is an arithmetic number, because the mean of its divisors is an integer number (32337607080163).

Almost surely, 2^{120111112012021} is an apocalyptic number.

It is an amenable number.

120111112012021 is a deficient number, since it is larger than the sum of its proper divisors (9239316308631).

120111112012021 is an equidigital number, since it uses as much as digits as its factorization.

120111112012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9239316308630.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 120111112012021 its reverse (120210211111021), we get a palindrome (240321323123042).

The spelling of 120111112012021 in words is "one hundred twenty trillion, one hundred eleven billion, one hundred twelve million, twelve thousand, twenty-one".