1023312320121 has 64 divisors (see below), whose sum is σ = 1728276480000. Its totient is φ = 524081892096.

The previous prime is 1023312320117. The next prime is 1023312320143. The reversal of 1023312320121 is 1210232133201.

It is not a de Polignac number, because 1023312320121 - 2² = 1023312320117 is a prime.

It is a super-2 number, since 2×1023312320121² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1023312324121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4732630 + ... + 4944128.

It is an arithmetic number, because the mean of its divisors is an integer number (27004320000).

Almost surely, 2^{1023312320121} is an apocalyptic number.

It is an amenable number.

1023312320121 is a deficient number, since it is larger than the sum of its proper divisors (704964159879).

1023312320121 is a wasteful number, since it uses less digits than its factorization.

1023312320121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212038.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1023312320121 its reverse (1210232133201), we get a palindrome (2233544453322).

The spelling of 1023312320121 in words is "one trillion, twenty-three billion, three hundred twelve million, three hundred twenty thousand, one hundred twenty-one".