3131221103111 has 4 divisors (see below), whose sum is σ = 3131258433912. Its totient is φ = 3131183772312.

The previous prime is 3131221103107. The next prime is 3131221103141. The reversal of 3131221103111 is 1113011221313.

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

It is a cyclic number.

It is not a de Polignac number, because 3131221103111 - 2² = 3131221103107 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 (3131221103141) 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, 18539300 + ... + 18707433.

It is an arithmetic number, because the mean of its divisors is an integer number (782814608478).

Almost surely, 2^{3131221103111} is an apocalyptic number.

3131221103111 is a deficient number, since it is larger than the sum of its proper divisors (37330801).

3131221103111 is an equidigital number, since it uses as much as digits as its factorization.

3131221103111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37330800.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 3131221103111 its reverse (1113011221313), we get a palindrome (4244232324424).

The spelling of 3131221103111 in words is "three trillion, one hundred thirty-one billion, two hundred twenty-one million, one hundred three thousand, one hundred eleven".