1321212322031 has 4 divisors (see below), whose sum is σ = 1509956939472. Its totient is φ = 1132467704592.

The previous prime is 1321212321983. The next prime is 1321212322039. The reversal of 1321212322031 is 1302232121231.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-1321212322031 is a prime.

It is a super-2 number, since 2×1321212322031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321212321988 and 1321212322006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321212322039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94372308710 + ... + 94372308723.

It is an arithmetic number, because the mean of its divisors is an integer number (377489234868).

Almost surely, 2^{1321212322031} is an apocalyptic number.

1321212322031 is a deficient number, since it is larger than the sum of its proper divisors (188744617441).

1321212322031 is an equidigital number, since it uses as much as digits as its factorization.

1321212322031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188744617440.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1321212322031 its reverse (1302232121231), we get a palindrome (2623444443262).

The spelling of 1321212322031 in words is "one trillion, three hundred twenty-one billion, two hundred twelve million, three hundred twenty-two thousand, thirty-one".