120721308 has 12 divisors (see below), whose sum is σ = 281683080. Its totient is φ = 40240432.

The previous prime is 120721297. The next prime is 120721331. The reversal of 120721308 is 803127021.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5030043 + ... + 5030066.

It is an arithmetic number, because the mean of its divisors is an integer number (23473590).

Almost surely, 2^120721308 is an apocalyptic number.

It is an amenable number.

120721308 is an abundant number, since it is smaller than the sum of its proper divisors (160961772).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

120721308 is a wasteful number, since it uses less digits than its factorization.

120721308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10060116 (or 10060114 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 120721308 is about 10987.3248791505. The cubic root of 120721308 is about 494.2287182514.

Adding to 120721308 its reverse (803127021), we get a palindrome (923848329).

The spelling of 120721308 in words is "one hundred twenty million, seven hundred twenty-one thousand, three hundred eight".