3131013110221 has 4 divisors (see below), whose sum is σ = 3132311749344. Its totient is φ = 3129714471100.

The previous prime is 3131013110219. The next prime is 3131013110287. The reversal of 3131013110221 is 1220113101313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3131013110221 - 2¹ = 3131013110219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131013170221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 649315945 + ... + 649320766.

It is an arithmetic number, because the mean of its divisors is an integer number (783077937336).

Almost surely, 2^{3131013110221} is an apocalyptic number.

It is an amenable number.

3131013110221 is a deficient number, since it is larger than the sum of its proper divisors (1298639123).

3131013110221 is a wasteful number, since it uses less digits than its factorization.

3131013110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298639122.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 3131013110221 its reverse (1220113101313), we get a palindrome (4351126211534).

The spelling of 3131013110221 in words is "three trillion, one hundred thirty-one billion, thirteen million, one hundred ten thousand, two hundred twenty-one".