21213022204312 has 32 divisors (see below), whose sum is σ = 39783513369600. Its totient is φ = 10604085659424.

The previous prime is 21213022204301. The next prime is 21213022204327. The reversal of 21213022204312 is 21340222031212.

It is a super-2 number, since 2×21213022204312² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 943502623 + ... + 943525105.

It is an arithmetic number, because the mean of its divisors is an integer number (1243234792800).

Almost surely, 2^{21213022204312} is an apocalyptic number.

It is an amenable number.

21213022204312 is a deficient number, since it is larger than the sum of its proper divisors (18570491165288).

21213022204312 is a wasteful number, since it uses less digits than its factorization.

21213022204312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44215 (or 44211 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21213022204312 its reverse (21340222031212), we get a palindrome (42553244235524).

The spelling of 21213022204312 in words is "twenty-one trillion, two hundred thirteen billion, twenty-two million, two hundred four thousand, three hundred twelve".