2122000000021 has 16 divisors (see below), whose sum is σ = 2453933810880. Its totient is φ = 1813501198080.

The previous prime is 2121999999929. The next prime is 2122000000031. The reversal of 2122000000021 is 1200000002212.

It is not a de Polignac number, because 2122000000021 - 2²⁵ = 2121966445589 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121999999944 and 2122000000007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122000000031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6444486 + ... + 6765751.

It is an arithmetic number, because the mean of its divisors is an integer number (153370863180).

Almost surely, 2^{2122000000021} is an apocalyptic number.

It is an amenable number.

2122000000021 is a deficient number, since it is larger than the sum of its proper divisors (331933810859).

2122000000021 is a wasteful number, since it uses less digits than its factorization.

2122000000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13211124.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 2122000000021 its reverse (1200000002212), we get a palindrome (3322000002233).

The spelling of 2122000000021 in words is "two trillion, one hundred twenty-two billion, twenty-one", and thus it is an aban number.