1321222221231 has 96 divisors (see below), whose sum is σ = 2030550197760. Its totient is φ = 762595680000.

The previous prime is 1321222221169. The next prime is 1321222221239.

1321222221231 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1321222221231 - 2¹³ = 1321222213039 is a prime.

It is a super-2 number, since 2×1321222221231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321222221239) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 300891046 + ... + 300895436.

It is an arithmetic number, because the mean of its divisors is an integer number (21151564560).

Almost surely, 2^{1321222221231} is an apocalyptic number.

1321222221231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1321222221231 is a deficient number, since it is larger than the sum of its proper divisors (709327976529).

1321222221231 is a wasteful number, since it uses less digits than its factorization.

1321222221231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4829 (or 4818 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

The spelling of 1321222221231 in words is "one trillion, three hundred twenty-one billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred thirty-one".