31213031202101 has 16 divisors (see below), whose sum is σ = 35737287060096. Its totient is φ = 26705091448896.

The previous prime is 31213031202061. The next prime is 31213031202149. The reversal of 31213031202101 is 10120213031213.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-31213031202101 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 (31213031201101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131656070 + ... + 131892936.

It is an arithmetic number, because the mean of its divisors is an integer number (2233580441256).

Almost surely, 2^{31213031202101} is an apocalyptic number.

It is an amenable number.

31213031202101 is a deficient number, since it is larger than the sum of its proper divisors (4524255857995).

31213031202101 is a wasteful number, since it uses less digits than its factorization.

31213031202101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271228.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 31213031202101 its reverse (10120213031213), we get a palindrome (41333244233314).

The spelling of 31213031202101 in words is "thirty-one trillion, two hundred thirteen billion, thirty-one million, two hundred two thousand, one hundred one".