120137881 has 2 divisors, whose sum is σ = 120137882. Its totient is φ = 120137880.

The previous prime is 120137867. The next prime is 120137971. The reversal of 120137881 is 188731021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104857600 + 15280281 = 10240^2 + 3909^2 .

It is a cyclic number.

It is not a de Polignac number, because 120137881 - 2⁷ = 120137753 is a prime.

It is a super-2 number, since 2×120137881² = 28866220902340322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (120137681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60068940 + 60068941.

It is an arithmetic number, because the mean of its divisors is an integer number (60068941).

Almost surely, 2^120137881 is an apocalyptic number.

It is an amenable number.

120137881 is a deficient number, since it is larger than the sum of its proper divisors (1).

120137881 is an equidigital number, since it uses as much as digits as its factorization.

120137881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 120137881 is about 10960.7427211845. The cubic root of 120137881 is about 493.4312557730.

The spelling of 120137881 in words is "one hundred twenty million, one hundred thirty-seven thousand, eight hundred eighty-one".