1331320222031 has 2 divisors, whose sum is σ = 1331320222032. Its totient is φ = 1331320222030.

The previous prime is 1331320222021. The next prime is 1331320222061. The reversal of 1331320222031 is 1302220231331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1331320222031 - 2²⁶ = 1331253113167 is a prime.

It is a super-2 number, since 2×1331320222031² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1331320221988 and 1331320222006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331320222021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665660111015 + 665660111016.

It is an arithmetic number, because the mean of its divisors is an integer number (665660111016).

Almost surely, 2^{1331320222031} is an apocalyptic number.

1331320222031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331320222031 is an equidigital number, since it uses as much as digits as its factorization.

1331320222031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 1331320222031 its reverse (1302220231331), we get a palindrome (2633540453362).

The spelling of 1331320222031 in words is "one trillion, three hundred thirty-one billion, three hundred twenty million, two hundred twenty-two thousand, thirty-one".