21011112210000 has 200 divisors, whose sum is σ = 73992733920864. Its totient is φ = 5093602880000.

The previous prime is 21011112209953. The next prime is 21011112210031. The reversal of 21011112210000 is 1221111012.

It is a tau number, because it is divible by the number of its divisors (200).

It is a super-2 number, since 2×21011112210000² (a number of 27 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 31505019 + ... + 32165018.

Almost surely, 2^{21011112210000} is an apocalyptic number.

21011112210000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21011112210000 is an abundant number, since it is smaller than the sum of its proper divisors (52981621710864).

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

21011112210000 is a wasteful number, since it uses less digits than its factorization.

21011112210000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63670079 (or 63670058 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21011112210000 its reverse (1221111012), we get a palindrome (21012333321012).

The spelling of 21011112210000 in words is "twenty-one trillion, eleven billion, one hundred twelve million, two hundred ten thousand".