21102012011000 has 64 divisors (see below), whose sum is σ = 49575436616160. Its totient is φ = 8407176000000.

The previous prime is 21102012010973. The next prime is 21102012011029. The reversal of 21102012011000 is 11021020112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41784881 + ... + 42286880.

Almost surely, 2^{21102012011000} is an apocalyptic number.

21102012011000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21102012011000 is an abundant number, since it is smaller than the sum of its proper divisors (28473424605160).

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

21102012011000 is a wasteful number, since it uses less digits than its factorization.

21102012011000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84072033 (or 84072019 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21102012011000 its reverse (11021020112), we get a palindrome (21113033031112).

The spelling of 21102012011000 in words is "twenty-one trillion, one hundred two billion, twelve million, eleven thousand".