213232113128 has 16 divisors (see below), whose sum is σ = 400235104260. Its totient is φ = 106502752000.

The previous prime is 213232113121. The next prime is 213232113169. The reversal of 213232113128 is 821311232312.

It can be written as a sum of positive squares in 2 ways, for example, as 176986807204 + 36245305924 = 420698^2 + 190382^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 213232113128.

It is not an unprimeable number, because it can be changed into a prime (213232113121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14155073 + ... + 14170128.

Almost surely, 2^213232113128 is an apocalyptic number.

It is an amenable number.

213232113128 is a deficient number, since it is larger than the sum of its proper divisors (187002991132).

213232113128 is a wasteful number, since it uses less digits than its factorization.

213232113128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28326148 (or 28326144 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The spelling of 213232113128 in words is "two hundred thirteen billion, two hundred thirty-two million, one hundred thirteen thousand, one hundred twenty-eight".