120136631 has 2 divisors, whose sum is σ = 120136632. Its totient is φ = 120136630.

The previous prime is 120136609. The next prime is 120136649. The reversal of 120136631 is 136631021.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 120136631 - 2²² = 115942327 is a prime.

It is a super-2 number, since 2×120136631² = 28865620216060322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 120136597 and 120136606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120136231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60068315 + 60068316.

It is an arithmetic number, because the mean of its divisors is an integer number (60068316).

Almost surely, 2^120136631 is an apocalyptic number.

120136631 is a deficient number, since it is larger than the sum of its proper divisors (1).

120136631 is an equidigital number, since it uses as much as digits as its factorization.

120136631 is an odious number, because the sum of its binary digits is odd.

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

The square root of 120136631 is about 10960.6856993529. The cubic root of 120136631 is about 493.4295444304.

Adding to 120136631 its reverse (136631021), we get a palindrome (256767652).

The spelling of 120136631 in words is "one hundred twenty million, one hundred thirty-six thousand, six hundred thirty-one".