3211113128 has 8 divisors (see below), whose sum is σ = 6020837130. Its totient is φ = 1605556560.

The previous prime is 3211113127. The next prime is 3211113133. The reversal of 3211113128 is 8213111123.

It can be written as a sum of positive squares in only one way, i.e., 3149678884 + 61434244 = 56122^2 + 7838^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×3211113128² = 20622495041627888768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3211113127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200694563 + ... + 200694578.

Almost surely, 2^3211113128 is an apocalyptic number.

It is an amenable number.

3211113128 is a deficient number, since it is larger than the sum of its proper divisors (2809724002).

3211113128 is a wasteful number, since it uses less digits than its factorization.

3211113128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401389147 (or 401389143 counting only the distinct ones).

The product of its digits is 288, while the sum is 23.

The square root of 3211113128 is about 56666.6844627423. The cubic root of 3211113128 is about 1475.3165082345.

The spelling of 3211113128 in words is "three billion, two hundred eleven million, one hundred thirteen thousand, one hundred twenty-eight".