21000012021132 has 12 divisors (see below), whose sum is σ = 49000028049336. Its totient is φ = 7000004007040.

The previous prime is 21000012021103. The next prime is 21000012021151. The reversal of 21000012021132 is 23112021000012.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×21000012021132² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 875000500869 + ... + 875000500892.

It is an arithmetic number, because the mean of its divisors is an integer number (4083335670778).

Almost surely, 2^{21000012021132} is an apocalyptic number.

It is an amenable number.

21000012021132 is an abundant number, since it is smaller than the sum of its proper divisors (28000016028204).

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

21000012021132 is a wasteful number, since it uses less digits than its factorization.

21000012021132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750001001768 (or 1750001001766 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21000012021132 its reverse (23112021000012), we get a palindrome (44112033021144).

The spelling of 21000012021132 in words is "twenty-one trillion, twelve million, twenty-one thousand, one hundred thirty-two".