120021137 has 2 divisors, whose sum is σ = 120021138. Its totient is φ = 120021136.

The previous prime is 120021101. The next prime is 120021191. The reversal of 120021137 is 731120021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63936016 + 56085121 = 7996^2 + 7489^2 .

It is a cyclic number.

It is not a de Polignac number, because 120021137 - 2¹⁰ = 120020113 is a prime.

It is not a weakly prime, because it can be changed into another prime (120021197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60010568 + 60010569.

It is an arithmetic number, because the mean of its divisors is an integer number (60010569).

Almost surely, 2^120021137 is an apocalyptic number.

It is an amenable number.

120021137 is a deficient number, since it is larger than the sum of its proper divisors (1).

120021137 is an equidigital number, since it uses as much as digits as its factorization.

120021137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 120021137 is about 10955.4158752646. The cubic root of 120021137 is about 493.2713733462.

Adding to 120021137 its reverse (731120021), we get a palindrome (851141158).

The spelling of 120021137 in words is "one hundred twenty million, twenty-one thousand, one hundred thirty-seven".