2122111000021 has 4 divisors (see below), whose sum is σ = 2122382273472. Its totient is φ = 2121839726572.

The previous prime is 2122111000007. The next prime is 2122111000057. The reversal of 2122111000021 is 1200001112212.

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 2122111000021 - 2⁷ = 2122110999893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2122110999965 and 2122111000010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122111000921) 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, 135624991 + ... + 135640636.

It is an arithmetic number, because the mean of its divisors is an integer number (530595568368).

Almost surely, 2^{2122111000021} is an apocalyptic number.

It is an amenable number.

2122111000021 is a deficient number, since it is larger than the sum of its proper divisors (271273451).

2122111000021 is an equidigital number, since it uses as much as digits as its factorization.

2122111000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271273450.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2122111000021 its reverse (1200001112212), we get a palindrome (3322112112233).

The spelling of 2122111000021 in words is "two trillion, one hundred twenty-two billion, one hundred eleven million, twenty-one", and thus it is an aban number.