21001011212000 has 96 divisors (see below), whose sum is σ = 53842940633664. Its totient is φ = 8035169472000.

The previous prime is 21001011211967. The next prime is 21001011212021. The reversal of 21001011212000 is 21211010012.

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, 114043931 + ... + 114227930.

It is an arithmetic number, because the mean of its divisors is an integer number (560863964934).

Almost surely, 2^{21001011212000} is an apocalyptic number.

21001011212000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21001011212000 is an abundant number, since it is smaller than the sum of its proper divisors (32841929421664).

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

21001011212000 is a wasteful number, since it uses less digits than its factorization.

21001011212000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228271909 (or 228271891 counting only the distinct ones).

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

Adding to 21001011212000 its reverse (21211010012), we get a palindrome (21022222222012).

The spelling of 21001011212000 in words is "twenty-one trillion, one billion, eleven million, two hundred twelve thousand".