120621191 has 4 divisors (see below), whose sum is σ = 120664992. Its totient is φ = 120577392.

The previous prime is 120621187. The next prime is 120621199. The reversal of 120621191 is 191126021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 120621191 - 2² = 120621187 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120621199) 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, 17471 + ... + 23376.

It is an arithmetic number, because the mean of its divisors is an integer number (30166248).

Almost surely, 2^120621191 is an apocalyptic number.

120621191 is a deficient number, since it is larger than the sum of its proper divisors (43801).

120621191 is an equidigital number, since it uses as much as digits as its factorization.

120621191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43800.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 120621191 is about 10982.7679115968. The cubic root of 120621191 is about 494.0920553258.

The spelling of 120621191 in words is "one hundred twenty million, six hundred twenty-one thousand, one hundred ninety-one".