1221023231023 has 2 divisors, whose sum is σ = 1221023231024. Its totient is φ = 1221023231022.

The previous prime is 1221023230879. The next prime is 1221023231089. The reversal of 1221023231023 is 3201323201221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1221023231023 - 2³⁷ = 1083584277551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1221023230985 and 1221023231003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1221023231123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610511615511 + 610511615512.

It is an arithmetic number, because the mean of its divisors is an integer number (610511615512).

Almost surely, 2^{1221023231023} is an apocalyptic number.

1221023231023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221023231023 is an equidigital number, since it uses as much as digits as its factorization.

1221023231023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 1221023231023 its reverse (3201323201221), we get a palindrome (4422346432244).

The spelling of 1221023231023 in words is "one trillion, two hundred twenty-one billion, twenty-three million, two hundred thirty-one thousand, twenty-three".