213122133212 has 12 divisors (see below), whose sum is σ = 372967524720. Its totient is φ = 106559983296.

The previous prime is 213122133209. The next prime is 213122133227. The reversal of 213122133212 is 212331221312.

It is a congruent number.

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, 310433 + ... + 722919.

It is an arithmetic number, because the mean of its divisors is an integer number (31080627060).

Almost surely, 2^213122133212 is an apocalyptic number.

It is an amenable number.

213122133212 is a deficient number, since it is larger than the sum of its proper divisors (159845391508).

213122133212 is a wasteful number, since it uses less digits than its factorization.

213122133212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541660 (or 541658 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

Adding to 213122133212 its reverse (212331221312), we get a palindrome (425453354524).

The spelling of 213122133212 in words is "two hundred thirteen billion, one hundred twenty-two million, one hundred thirty-three thousand, two hundred twelve".