31201023133111 has 16 divisors (see below), whose sum is σ = 35481156933600. Its totient is φ = 27199032294528.

The previous prime is 31201023133109. The next prime is 31201023133121. The reversal of 31201023133111 is 11133132010213.

It is a cyclic number.

It is not a de Polignac number, because 31201023133111 - 2¹ = 31201023133109 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 (31201023133121) 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, 199164496 + ... + 199321093.

It is an arithmetic number, because the mean of its divisors is an integer number (2217572308350).

Almost surely, 2^{31201023133111} is an apocalyptic number.

31201023133111 is a deficient number, since it is larger than the sum of its proper divisors (4280133800489).

31201023133111 is a wasteful number, since it uses less digits than its factorization.

31201023133111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398485938.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 31201023133111 its reverse (11133132010213), we get a palindrome (42334155143324).

The spelling of 31201023133111 in words is "thirty-one trillion, two hundred one billion, twenty-three million, one hundred thirty-three thousand, one hundred eleven".