1321212022331 has 2 divisors, whose sum is σ = 1321212022332. Its totient is φ = 1321212022330.

The previous prime is 1321212022307. The next prime is 1321212022381. The reversal of 1321212022331 is 1332202121231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321212022331 - 2¹⁰ = 1321212021307 is a prime.

It is a super-2 number, since 2×1321212022331² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1321212022297 and 1321212022306.

It is not a weakly prime, because it can be changed into another prime (1321212022381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660606011165 + 660606011166.

It is an arithmetic number, because the mean of its divisors is an integer number (660606011166).

Almost surely, 2^{1321212022331} is an apocalyptic number.

1321212022331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321212022331 is an equidigital number, since it uses as much as digits as its factorization.

1321212022331 is an odious number, because the sum of its binary digits is odd.

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

Adding to 1321212022331 its reverse (1332202121231), we get a palindrome (2653414143562).

The spelling of 1321212022331 in words is "one trillion, three hundred twenty-one billion, two hundred twelve million, twenty-two thousand, three hundred thirty-one".