1231542210629 has 2 divisors, whose sum is σ = 1231542210630. Its totient is φ = 1231542210628.

The previous prime is 1231542210601. The next prime is 1231542210631. The reversal of 1231542210629 is 9260122451321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1221020580004 + 10521630625 = 1104998^2 + 102575^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231542210629 - 2³⁶ = 1162822733893 is a prime.

Together with 1231542210631, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1231542210592 and 1231542210601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231542210659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615771105314 + 615771105315.

It is an arithmetic number, because the mean of its divisors is an integer number (615771105315).

Almost surely, 2^{1231542210629} is an apocalyptic number.

It is an amenable number.

1231542210629 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231542210629 is an equidigital number, since it uses as much as digits as its factorization.

1231542210629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 1231542210629 in words is "one trillion, two hundred thirty-one billion, five hundred forty-two million, two hundred ten thousand, six hundred twenty-nine".