3121138832 has 80 divisors (see below), whose sum is σ = 7098212352. Its totient is φ = 1301650560.

The previous prime is 3121138829. The next prime is 3121138837. The reversal of 3121138832 is 2388311213.

It is not an unprimeable number, because it can be changed into a prime (3121138837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1477457 + ... + 1479567.

Almost surely, 2^3121138832 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3121138832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3549106176).

3121138832 is an abundant number, since it is smaller than the sum of its proper divisors (3977073520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3121138832 is a wasteful number, since it uses less digits than its factorization.

3121138832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2476 (or 2470 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 3121138832 is about 55867.1534266782. The cubic root of 3121138832 is about 1461.4064810081.

The spelling of 3121138832 in words is "three billion, one hundred twenty-one million, one hundred thirty-eight thousand, eight hundred thirty-two".