21020100010212 has 12 divisors (see below), whose sum is σ = 49046900023856. Its totient is φ = 7006700003400.

The previous prime is 21020100010207. The next prime is 21020100010229. The reversal of 21020100010212 is 21201000102012.

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

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 1751675000851 = 21020100010212 / (2 + 1 + 0 + 2 + 0 + 1 + 0 + 0 + 0 + 1 + 0 + 2 + 1 + 2).

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, 875837500414 + ... + 875837500437.

Almost surely, 2^{21020100010212} is an apocalyptic number.

It is an amenable number.

21020100010212 is an abundant number, since it is smaller than the sum of its proper divisors (28026800013644).

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

21020100010212 is a wasteful number, since it uses less digits than its factorization.

21020100010212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1751675000858 (or 1751675000856 counting only the distinct ones).

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

Adding to 21020100010212 its reverse (21201000102012), we get a palindrome (42221100112224).

The spelling of 21020100010212 in words is "twenty-one trillion, twenty billion, one hundred million, ten thousand, two hundred twelve".