3121421615103 has 64 divisors (see below), whose sum is σ = 4710236313600. Its totient is φ = 1821323535360.

The previous prime is 3121421615101. The next prime is 3121421615129. The reversal of 3121421615103 is 3015161241213.

It is not a de Polignac number, because 3121421615103 - 2¹ = 3121421615101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121421615101) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 600617301 + ... + 600622497.

It is an arithmetic number, because the mean of its divisors is an integer number (73597442400).

Almost surely, 2^{3121421615103} is an apocalyptic number.

3121421615103 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

3121421615103 is a deficient number, since it is larger than the sum of its proper divisors (1588814698497).

3121421615103 is a wasteful number, since it uses less digits than its factorization.

3121421615103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6912.

The product of its (nonzero) digits is 4320, while the sum is 30.

Adding to 3121421615103 its reverse (3015161241213), we get a palindrome (6136582856316).

The spelling of 3121421615103 in words is "three trillion, one hundred twenty-one billion, four hundred twenty-one million, six hundred fifteen thousand, one hundred three".