120020210000021 has 4 divisors (see below), whose sum is σ = 120020231960832. Its totient is φ = 120020188039212.

The previous prime is 120020209999993. The next prime is 120020210000027. The reversal of 120020210000021 is 120000012020021.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 120020210000021 - 2¹⁴ = 120020209983637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120020209999957 and 120020210000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120020210000027) 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, 4378700 + ... + 16100106.

It is an arithmetic number, because the mean of its divisors is an integer number (30005057990208).

Almost surely, 2^{120020210000021} is an apocalyptic number.

It is an amenable number.

120020210000021 is a deficient number, since it is larger than the sum of its proper divisors (21960811).

120020210000021 is a wasteful number, since it uses less digits than its factorization.

120020210000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21960810.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 120020210000021 its reverse (120000012020021), we get a palindrome (240020222020042).

The spelling of 120020210000021 in words is "one hundred twenty trillion, twenty billion, two hundred ten million, twenty-one", and thus it is an aban number.