3131133010221 has 4 divisors (see below), whose sum is σ = 4174844013632. Its totient is φ = 2087422006812.

The previous prime is 3131133010219. The next prime is 3131133010231. The reversal of 3131133010221 is 1220103311313.

It is a happy number.

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 not a de Polignac number, because 3131133010221 - 2¹ = 3131133010219 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131133010231) 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, 521855501701 + ... + 521855501706.

It is an arithmetic number, because the mean of its divisors is an integer number (1043711003408).

Almost surely, 2^{3131133010221} is an apocalyptic number.

It is an amenable number.

3131133010221 is a deficient number, since it is larger than the sum of its proper divisors (1043711003411).

3131133010221 is a wasteful number, since it uses less digits than its factorization.

3131133010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043711003410.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 3131133010221 its reverse (1220103311313), we get a palindrome (4351236321534).

The spelling of 3131133010221 in words is "three trillion, one hundred thirty-one billion, one hundred thirty-three million, ten thousand, two hundred twenty-one".