3121171042 has 16 divisors (see below), whose sum is σ = 5149584864. Its totient is φ = 1418712900.

The previous prime is 3121171003. The next prime is 3121171051. The reversal of 3121171042 is 2401711213.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 583584 + ... + 588907.

It is an arithmetic number, because the mean of its divisors is an integer number (321849054).

Almost surely, 2^3121171042 is an apocalyptic number.

3121171042 is a deficient number, since it is larger than the sum of its proper divisors (2028413822).

3121171042 is a wasteful number, since it uses less digits than its factorization.

3121171042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172526 (or 1172504 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 3121171042 is about 55867.4416990791. The cubic root of 3121171042 is about 1461.4115082053.

Adding to 3121171042 its reverse (2401711213), we get a palindrome (5522882255).

The spelling of 3121171042 in words is "three billion, one hundred twenty-one million, one hundred seventy-one thousand, forty-two".