21201131001012 has 48 divisors (see below), whose sum is σ = 49552648250112. Its totient is φ = 7055141258880.

The previous prime is 21201131000999. The next prime is 21201131001059. The reversal of 21201131001012 is 21010013110212.

It is a junction number, because it is equal to n+sod(n) for n = 21201131000982 and 21201131001000.

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, 46596198 + ... + 47048994.

It is an arithmetic number, because the mean of its divisors is an integer number (1032346838544).

Almost surely, 2^{21201131001012} is an apocalyptic number.

It is an amenable number.

21201131001012 is an abundant number, since it is smaller than the sum of its proper divisors (28351517249100).

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

21201131001012 is a wasteful number, since it uses less digits than its factorization.

21201131001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459368 (or 459366 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21201131001012 its reverse (21010013110212), we get a palindrome (42211144111224).

The spelling of 21201131001012 in words is "twenty-one trillion, two hundred one billion, one hundred thirty-one million, one thousand, twelve".