120999958 has 4 divisors (see below), whose sum is σ = 181499940. Its totient is φ = 60499978.

The previous prime is 120999947. The next prime is 120999997. The reversal of 120999958 is 859999021.

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

It is a super-4 number, since 4×120999958⁴ (a number of 33 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30249988 + ... + 30249991.

It is an arithmetic number, because the mean of its divisors is an integer number (45374985).

Almost surely, 2^120999958 is an apocalyptic number.

120999958 is a deficient number, since it is larger than the sum of its proper divisors (60499982).

120999958 is an equidigital number, since it uses as much as digits as its factorization.

120999958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60499981.

The product of its (nonzero) digits is 524880, while the sum is 52.

The square root of 120999958 is about 10999.9980909089. The cubic root of 120999958 is about 494.6086870974.

The spelling of 120999958 in words is "one hundred twenty million, nine hundred ninety-nine thousand, nine hundred fifty-eight".