31122002231 has 2 divisors, whose sum is σ = 31122002232. Its totient is φ = 31122002230.

The previous prime is 31122002089. The next prime is 31122002273. The reversal of 31122002231 is 13220022113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31122002231 - 2¹⁴ = 31121985847 is a prime.

It is a super-2 number, since 2×31122002231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31122001231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15561001115 + 15561001116.

It is an arithmetic number, because the mean of its divisors is an integer number (15561001116).

Almost surely, 2^31122002231 is an apocalyptic number.

31122002231 is a deficient number, since it is larger than the sum of its proper divisors (1).

31122002231 is an equidigital number, since it uses as much as digits as its factorization.

31122002231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31122002231 its reverse (13220022113), we get a palindrome (44342024344).

The spelling of 31122002231 in words is "thirty-one billion, one hundred twenty-two million, two thousand, two hundred thirty-one".