120208981 has 4 divisors (see below), whose sum is σ = 120262464. Its totient is φ = 120155500.

The previous prime is 120208969. The next prime is 120208987. The reversal of 120208981 is 189802021.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-120208981 is a prime.

It is a super-2 number, since 2×120208981² = 28900398226116722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120208987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23215 + ... + 27916.

It is an arithmetic number, because the mean of its divisors is an integer number (30065616).

Almost surely, 2^120208981 is an apocalyptic number.

It is an amenable number.

120208981 is a deficient number, since it is larger than the sum of its proper divisors (53483).

120208981 is an equidigital number, since it uses as much as digits as its factorization.

120208981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53482.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 120208981 is about 10963.9856347954. The cubic root of 120208981 is about 493.5285774041.

The spelling of 120208981 in words is "one hundred twenty million, two hundred eight thousand, nine hundred eighty-one".