120621161 has 4 divisors (see below), whose sum is σ = 122074512. Its totient is φ = 119167812.

The previous prime is 120621157. The next prime is 120621167. The reversal of 120621161 is 161126021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 120621161 - 2² = 120621157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120621167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 726551 + ... + 726716.

It is an arithmetic number, because the mean of its divisors is an integer number (30518628).

Almost surely, 2^120621161 is an apocalyptic number.

It is an amenable number.

120621161 is a deficient number, since it is larger than the sum of its proper divisors (1453351).

120621161 is an equidigital number, since it uses as much as digits as its factorization.

120621161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1453350.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 120621161 is about 10982.7665458208. The cubic root of 120621161 is about 494.0920143635.

Adding to 120621161 its reverse (161126021), we get a palindrome (281747182).

The spelling of 120621161 in words is "one hundred twenty million, six hundred twenty-one thousand, one hundred sixty-one".