3121145102 has 4 divisors (see below), whose sum is σ = 4681717656. Its totient is φ = 1560572550.

The previous prime is 3121145099. The next prime is 3121145117. The reversal of 3121145102 is 2015411213.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 780286274 + ... + 780286277.

It is an arithmetic number, because the mean of its divisors is an integer number (1170429414).

Almost surely, 2^3121145102 is an apocalyptic number.

3121145102 is a deficient number, since it is larger than the sum of its proper divisors (1560572554).

3121145102 is a wasteful number, since it uses less digits than its factorization.

3121145102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1560572553.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 3121145102 is about 55867.2095419129. The cubic root of 3121145102 is about 1461.4074596052.

Adding to 3121145102 its reverse (2015411213), we get a palindrome (5136556315).

The spelling of 3121145102 in words is "three billion, one hundred twenty-one million, one hundred forty-five thousand, one hundred two".