120601981 has 8 divisors (see below), whose sum is σ = 128133720. Its totient is φ = 113295168.

The previous prime is 120601973. The next prime is 120601991. The reversal of 120601981 is 189106021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 78481881 + 42120100 = 8859^2 + 6490^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 120601981 - 2³ = 120601973 is a prime.

It is a super-2 number, since 2×120601981² = 29089675642248722, 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 (120601931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55126 + ... + 57271.

It is an arithmetic number, because the mean of its divisors is an integer number (16016715).

Almost surely, 2^120601981 is an apocalyptic number.

It is an amenable number.

120601981 is a deficient number, since it is larger than the sum of its proper divisors (7531739).

120601981 is a wasteful number, since it uses less digits than its factorization.

120601981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112463.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 120601981 is about 10981.8933249235. The cubic root of 120601981 is about 494.0658244117.

It can be divided in two parts, 12060 and 1981, that added together give a palindrome (14041).

The spelling of 120601981 in words is "one hundred twenty million, six hundred one thousand, nine hundred eighty-one".