1232312021 has 2 divisors, whose sum is σ = 1232312022. Its totient is φ = 1232312020.

The previous prime is 1232311967. The next prime is 1232312033. The reversal of 1232312021 is 1202132321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 915970225 + 316341796 = 30265^2 + 17786^2 .

It is a cyclic number.

It is not a de Polignac number, because 1232312021 - 2²⁶ = 1165203157 is a prime.

It is a super-2 number, since 2×1232312021² = 3037185834202208882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1232312821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616156010 + 616156011.

It is an arithmetic number, because the mean of its divisors is an integer number (616156011).

Almost surely, 2^1232312021 is an apocalyptic number.

It is an amenable number.

1232312021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232312021 is an equidigital number, since it uses as much as digits as its factorization.

1232312021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1232312021 is about 35104.3020298083. The cubic root of 1232312021 is about 1072.1121759817.

Adding to 1232312021 its reverse (1202132321), we get a palindrome (2434444342).

The spelling of 1232312021 in words is "one billion, two hundred thirty-two million, three hundred twelve thousand, twenty-one".