120012181 has 4 divisors (see below), whose sum is σ = 120035500. Its totient is φ = 119988864.

The previous prime is 120012169. The next prime is 120012187. The reversal of 120012181 is 181210021.

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

It can be written as a sum of positive squares in 2 ways, for example, as 71487025 + 48525156 = 8455^2 + 6966^2 .

It is a cyclic number.

It is not a de Polignac number, because 120012181 - 2¹⁷ = 119881109 is a prime.

It is a super-2 number, since 2×120012181² = 28805847176753522, 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 (120012187) 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, 156 + ... + 15493.

It is an arithmetic number, because the mean of its divisors is an integer number (30008875).

Almost surely, 2^120012181 is an apocalyptic number.

It is an amenable number.

120012181 is a deficient number, since it is larger than the sum of its proper divisors (23319).

120012181 is an equidigital number, since it uses as much as digits as its factorization.

120012181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23318.

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 120012181 is about 10955.0071200342. The cubic root of 120012181 is about 493.2591037066.

The spelling of 120012181 in words is "one hundred twenty million, twelve thousand, one hundred eighty-one".