1002221123231 has 4 divisors (see below), whose sum is σ = 1002258603600. Its totient is φ = 1002183642864.

The previous prime is 1002221123191. The next prime is 1002221123251. The reversal of 1002221123231 is 1323211222001.

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

It is a cyclic number.

It is not a de Polignac number, because 1002221123231 - 2²² = 1002216928927 is a prime.

It is a super-2 number, since 2×1002221123231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002221123251) 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, 18700046 + ... + 18753563.

It is an arithmetic number, because the mean of its divisors is an integer number (250564650900).

Almost surely, 2^{1002221123231} is an apocalyptic number.

1002221123231 is a deficient number, since it is larger than the sum of its proper divisors (37480369).

1002221123231 is an equidigital number, since it uses as much as digits as its factorization.

1002221123231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37480368.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1002221123231 its reverse (1323211222001), we get a palindrome (2325432345232).

The spelling of 1002221123231 in words is "one trillion, two billion, two hundred twenty-one million, one hundred twenty-three thousand, two hundred thirty-one".