1023221320431 has 32 divisors (see below), whose sum is σ = 1441354137600. Its totient is φ = 644391833184.

The previous prime is 1023221320409. The next prime is 1023221320447. The reversal of 1023221320431 is 1340231223201.

It is not a de Polignac number, because 1023221320431 - 2⁵ = 1023221320399 is a prime.

It is a super-2 number, since 2×1023221320431² (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 (1023221320481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2412120 + ... + 2804418.

It is an arithmetic number, because the mean of its divisors is an integer number (45042316800).

Almost surely, 2^{1023221320431} is an apocalyptic number.

1023221320431 is a deficient number, since it is larger than the sum of its proper divisors (418132817169).

1023221320431 is a wasteful number, since it uses less digits than its factorization.

1023221320431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392795.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 1023221320431 its reverse (1340231223201), we get a palindrome (2363452543632).

The spelling of 1023221320431 in words is "one trillion, twenty-three billion, two hundred twenty-one million, three hundred twenty thousand, four hundred thirty-one".