213121213130312 has 32 divisors (see below), whose sum is σ = 409349691424800. Its totient is φ = 103961308368000.

The previous prime is 213121213130261. The next prime is 213121213130321. The reversal of 213121213130312 is 213031312121312.

It is a super-2 number, since 2×213121213130312² (a number of 29 digits) contains 22 as substring.

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, 240959687 + ... + 241842537.

It is an arithmetic number, because the mean of its divisors is an integer number (12792177857025).

Almost surely, 2^{213121213130312} is an apocalyptic number.

It is an amenable number.

213121213130312 is a deficient number, since it is larger than the sum of its proper divisors (196228478294488).

213121213130312 is a wasteful number, since it uses less digits than its factorization.

213121213130312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618877 (or 1618873 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

Adding to 213121213130312 its reverse (213031312121312), we get a palindrome (426152525251624).

The spelling of 213121213130312 in words is "two hundred thirteen trillion, one hundred twenty-one billion, two hundred thirteen million, one hundred thirty thousand, three hundred twelve".