21011022000012 has 48 divisors (see below), whose sum is σ = 53482886376192. Its totient is φ = 6366942444480.

The previous prime is 21011021999977. The next prime is 21011022000049. The reversal of 21011022000012 is 21000022011012.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36740538 + ... + 37308030.

It is an arithmetic number, because the mean of its divisors is an integer number (1114226799504).

Almost surely, 2^{21011022000012} is an apocalyptic number.

21011022000012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21011022000012 is an abundant number, since it is smaller than the sum of its proper divisors (32471864376180).

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

21011022000012 is a wasteful number, since it uses less digits than its factorization.

21011022000012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847998 (or 847996 counting only the distinct ones).

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

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

The spelling of 21011022000012 in words is "twenty-one trillion, eleven billion, twenty-two million, twelve", and thus it is an aban number and an uban number.