21000022011012 has 48 divisors (see below), whose sum is σ = 53455242238272. Its totient is φ = 6363566753280.

The previous prime is 21000022010993. The next prime is 21000022011013. The reversal of 21000022011012 is 21011022000012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (21000022011013) 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, 10631368 + ... + 12450944.

It is an arithmetic number, because the mean of its divisors is an integer number (1113650879964).

Almost surely, 2^{21000022011012} is an apocalyptic number.

21000022011012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21000022011012 is an abundant number, since it is smaller than the sum of its proper divisors (32455220227260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21000022011012 is a wasteful number, since it uses less digits than its factorization.

21000022011012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1907028 (or 1907026 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21000022011012 its reverse (21011022000012), we get a palindrome (42011044011024).

The spelling of 21000022011012 in words is "twenty-one trillion, twenty-two million, eleven thousand, twelve".