1231422143969 has 2 divisors, whose sum is σ = 1231422143970. Its totient is φ = 1231422143968.

The previous prime is 1231422143957. The next prime is 1231422143971. The reversal of 1231422143969 is 9693412241321.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1028778118369 + 202644025600 = 1014287^2 + 450160^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231422143969 - 2¹² = 1231422139873 is a prime.

It is a super-2 number, since 2×1231422143969² (a number of 25 digits) contains 22 as substring.

Together with 1231422143971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1231422103969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615711071984 + 615711071985.

It is an arithmetic number, because the mean of its divisors is an integer number (615711071985).

Almost surely, 2^{1231422143969} is an apocalyptic number.

It is an amenable number.

1231422143969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231422143969 is an equidigital number, since it uses as much as digits as its factorization.

1231422143969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 47.

The spelling of 1231422143969 in words is "one trillion, two hundred thirty-one billion, four hundred twenty-two million, one hundred forty-three thousand, nine hundred sixty-nine".