120012211111021 has 4 divisors (see below), whose sum is σ = 120580989362944. Its totient is φ = 119443432859100.

The previous prime is 120012211111019. The next prime is 120012211111057. The reversal of 120012211111021 is 120111112210021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 120012211111021 - 2¹ = 120012211111019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120012211110986 and 120012211111004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120012211111321) 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, 284389125645 + ... + 284389126066.

It is an arithmetic number, because the mean of its divisors is an integer number (30145247340736).

Almost surely, 2^{120012211111021} is an apocalyptic number.

It is an amenable number.

120012211111021 is a deficient number, since it is larger than the sum of its proper divisors (568778251923).

120012211111021 is an equidigital number, since it uses as much as digits as its factorization.

120012211111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568778251922.

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

Adding to 120012211111021 its reverse (120111112210021), we get a palindrome (240123323321042).

The spelling of 120012211111021 in words is "one hundred twenty trillion, twelve billion, two hundred eleven million, one hundred eleven thousand, twenty-one".