12122111000021 has 4 divisors (see below), whose sum is σ = 13224121090944. Its totient is φ = 11020100909100.

The previous prime is 12122111000003. The next prime is 12122111000059. The reversal of 12122111000021 is 12000011122121.

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 12122111000021 - 2³⁴ = 12104931130837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122111000221) 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, 551005045445 + ... + 551005045466.

It is an arithmetic number, because the mean of its divisors is an integer number (3306030272736).

Almost surely, 2^{12122111000021} is an apocalyptic number.

12122111000021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12122111000021 is a deficient number, since it is larger than the sum of its proper divisors (1102010090923).

12122111000021 is a wasteful number, since it uses less digits than its factorization.

12122111000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102010090922.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12122111000021 its reverse (12000011122121), we get a palindrome (24122122122142).

The spelling of 12122111000021 in words is "twelve trillion, one hundred twenty-two billion, one hundred eleven million, twenty-one", and thus it is an aban number.