120213121 has 6 divisors (see below), whose sum is σ = 139839810. Its totient is φ = 103039776.

The previous prime is 120213089. The next prime is 120213139. The reversal of 120213121 is 121312021.

It can be written as a sum of positive squares in only one way, i.e., 90630400 + 29582721 = 9520^2 + 5439^2 .

It is not a de Polignac number, because 120213121 - 2⁵ = 120213089 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120213151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1226616 + ... + 1226713.

It is an arithmetic number, because the mean of its divisors is an integer number (23306635).

Almost surely, 2^120213121 is an apocalyptic number.

It is an amenable number.

120213121 is a deficient number, since it is larger than the sum of its proper divisors (19626689).

120213121 is an equidigital number, since it uses as much as digits as its factorization.

120213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2453343 (or 2453336 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 120213121 is about 10964.1744331254. The cubic root of 120213121 is about 493.5342430508.

Adding to 120213121 its reverse (121312021), we get a palindrome (241525142).

The spelling of 120213121 in words is "one hundred twenty million, two hundred thirteen thousand, one hundred twenty-one".