1231333222057 has 2 divisors, whose sum is σ = 1231333222058. Its totient is φ = 1231333222056.

The previous prime is 1231333222019. The next prime is 1231333222073. The reversal of 1231333222057 is 7502223331321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 835074302976 + 396258919081 = 913824^2 + 629491^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231333222057 - 2³¹ = 1229185738409 is a prime.

It is a super-2 number, since 2×1231333222057² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1231333222087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615666611028 + 615666611029.

It is an arithmetic number, because the mean of its divisors is an integer number (615666611029).

Almost surely, 2^{1231333222057} is an apocalyptic number.

It is an amenable number.

1231333222057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231333222057 is an equidigital number, since it uses as much as digits as its factorization.

1231333222057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 34.

Adding to 1231333222057 its reverse (7502223331321), we get a palindrome (8733556553378).

The spelling of 1231333222057 in words is "one trillion, two hundred thirty-one billion, three hundred thirty-three million, two hundred twenty-two thousand, fifty-seven".