31220001113431 has 12 divisors (see below), whose sum is σ = 34630816656240. Its totient is φ = 28115573229120.

The previous prime is 31220001113381. The next prime is 31220001113437. The reversal of 31220001113431 is 13431110002213.

It is not a de Polignac number, because 31220001113431 - 2¹⁹ = 31220000589143 is a prime.

It is a super-2 number, since 2×31220001113431² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31220001113437) 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 11 ways as a sum of consecutive naturals, for example, 2252843491 + ... + 2252857348.

It is an arithmetic number, because the mean of its divisors is an integer number (2885901388020).

Almost surely, 2^{31220001113431} is an apocalyptic number.

31220001113431 is a deficient number, since it is larger than the sum of its proper divisors (3410815542809).

31220001113431 is a wasteful number, since it uses less digits than its factorization.

31220001113431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4505700906 (or 4505700893 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 31220001113431 its reverse (13431110002213), we get a palindrome (44651111115644).

The spelling of 31220001113431 in words is "thirty-one trillion, two hundred twenty billion, one million, one hundred thirteen thousand, four hundred thirty-one".