3921311121 has 32 divisors (see below), whose sum is σ = 6438851328. Its totient is φ = 2067137280.

The previous prime is 3921311099. The next prime is 3921311123. The reversal of 3921311121 is 1211131293.

It is not a de Polignac number, because 3921311121 - 2⁶ = 3921311057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3921311091 and 3921311100.

It is not an unprimeable number, because it can be changed into a prime (3921311123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 607491 + ... + 613911.

It is an arithmetic number, because the mean of its divisors is an integer number (201214104).

Almost surely, 2^3921311121 is an apocalyptic number.

It is an amenable number.

3921311121 is a deficient number, since it is larger than the sum of its proper divisors (2517540207).

3921311121 is a wasteful number, since it uses less digits than its factorization.

3921311121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8681.

The product of its digits is 324, while the sum is 24.

The square root of 3921311121 is about 62620.3730506295. The cubic root of 3921311121 is about 1576.9228043647.

The spelling of 3921311121 in words is "three billion, nine hundred twenty-one million, three hundred eleven thousand, one hundred twenty-one".