120211210120021 has 4 divisors (see below), whose sum is σ = 120211241585344. Its totient is φ = 120211178654700.

The previous prime is 120211210120013. The next prime is 120211210120031. The reversal of 120211210120021 is 120021012112021.

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 120211210120021 - 2³ = 120211210120013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120211210119977 and 120211210120004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120211210120031) 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, 9058125 + ... + 17957506.

It is an arithmetic number, because the mean of its divisors is an integer number (30052810396336).

Almost surely, 2^{120211210120021} is an apocalyptic number.

It is an amenable number.

120211210120021 is a deficient number, since it is larger than the sum of its proper divisors (31465323).

120211210120021 is an equidigital number, since it uses as much as digits as its factorization.

120211210120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31465322.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 120211210120021 its reverse (120021012112021), we get a palindrome (240232222232042).

The spelling of 120211210120021 in words is "one hundred twenty trillion, two hundred eleven billion, two hundred ten million, one hundred twenty thousand, twenty-one".