120021977 has 2 divisors, whose sum is σ = 120021978. Its totient is φ = 120021976.

The previous prime is 120021961. The next prime is 120022003. The reversal of 120021977 is 779120021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119880601 + 141376 = 10949^2 + 376^2 .

It is a cyclic number.

It is not a de Polignac number, because 120021977 - 2⁴ = 120021961 is a prime.

It is not a weakly prime, because it can be changed into another prime (120021907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60010988 + 60010989.

It is an arithmetic number, because the mean of its divisors is an integer number (60010989).

Almost surely, 2^120021977 is an apocalyptic number.

It is an amenable number.

120021977 is a deficient number, since it is larger than the sum of its proper divisors (1).

120021977 is an equidigital number, since it uses as much as digits as its factorization.

120021977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 29.

The square root of 120021977 is about 10955.4542124003. The cubic root of 120021977 is about 493.2725241074.

Adding to 120021977 its reverse (779120021), we get a palindrome (899141998).

The spelling of 120021977 in words is "one hundred twenty million, twenty-one thousand, nine hundred seventy-seven".