1233131231021 has 2 divisors, whose sum is σ = 1233131231022. Its totient is φ = 1233131231020.

The previous prime is 1233131230979. The next prime is 1233131231051. The reversal of 1233131231021 is 1201321313321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 725118668521 + 508012562500 = 851539^2 + 712750^2 .

It is a cyclic number.

It is not a de Polignac number, because 1233131231021 - 2⁶ = 1233131230957 is a prime.

It is a super-2 number, since 2×1233131231021² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1233131231051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616565615510 + 616565615511.

It is an arithmetic number, because the mean of its divisors is an integer number (616565615511).

Almost surely, 2^{1233131231021} is an apocalyptic number.

It is an amenable number.

1233131231021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1233131231021 is an equidigital number, since it uses as much as digits as its factorization.

1233131231021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1233131231021 its reverse (1201321313321), we get a palindrome (2434452544342).

The spelling of 1233131231021 in words is "one trillion, two hundred thirty-three billion, one hundred thirty-one million, two hundred thirty-one thousand, twenty-one".