3121320142 has 8 divisors (see below), whose sum is σ = 4683313800. Its totient is φ = 1560215544.

The previous prime is 3121320113. The next prime is 3121320187. The reversal of 3121320142 is 2410231213.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213417 + ... + 227572.

It is an arithmetic number, because the mean of its divisors is an integer number (585414225).

Almost surely, 2^3121320142 is an apocalyptic number.

3121320142 is a deficient number, since it is larger than the sum of its proper divisors (1561993658).

3121320142 is a wasteful number, since it uses less digits than its factorization.

3121320142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444530.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 3121320142 is about 55868.7760918386. The cubic root of 3121320142 is about 1461.4347786363.

Adding to 3121320142 its reverse (2410231213), we get a palindrome (5531551355).

The spelling of 3121320142 in words is "three billion, one hundred twenty-one million, three hundred twenty thousand, one hundred forty-two".