3121312142 has 16 divisors (see below), whose sum is σ = 5070295440. Its totient is φ = 1432555392.

The previous prime is 3121312127. The next prime is 3121312169. The reversal of 3121312142 is 2412131213.

3121312142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 330683 + ... + 339990.

It is an arithmetic number, because the mean of its divisors is an integer number (316893465).

Almost surely, 2^3121312142 is an apocalyptic number.

3121312142 is a deficient number, since it is larger than the sum of its proper divisors (1948983298).

3121312142 is a wasteful number, since it uses less digits than its factorization.

3121312142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670867.

The product of its digits is 288, while the sum is 20.

The square root of 3121312142 is about 55868.7044954508. The cubic root of 3121312142 is about 1461.4335300740.

Adding to 3121312142 its reverse (2412131213), we get a palindrome (5533443355).

The spelling of 3121312142 in words is "three billion, one hundred twenty-one million, three hundred twelve thousand, one hundred forty-two".