21313100203212 has 48 divisors (see below), whose sum is σ = 50094924630912. Its totient is φ = 7052318482560.

The previous prime is 21313100203211. The next prime is 21313100203229. The reversal of 21313100203212 is 21230200131312.

It is not an unprimeable number, because it can be changed into a prime (21313100203211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68516343 + ... + 68826705.

It is an arithmetic number, because the mean of its divisors is an integer number (1043644263144).

Almost surely, 2^{21313100203212} is an apocalyptic number.

It is an amenable number.

21313100203212 is an abundant number, since it is smaller than the sum of its proper divisors (28781824427700).

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

21313100203212 is a wasteful number, since it uses less digits than its factorization.

21313100203212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352278 (or 352276 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21313100203212 its reverse (21230200131312), we get a palindrome (42543300334524).

The spelling of 21313100203212 in words is "twenty-one trillion, three hundred thirteen billion, one hundred million, two hundred three thousand, two hundred twelve".