120120212121 has 16 divisors (see below), whose sum is σ = 197120348544. Its totient is φ = 63360111744.

The previous prime is 120120212101. The next prime is 120120212123. The reversal of 120120212121 is 121212021021.

It is not a de Polignac number, because 120120212121 - 2²⁹ = 119583341209 is a prime.

120120212121 is a modest number, since divided by 212121 gives 120120 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 120120212121.

It is not an unprimeable number, because it can be changed into a prime (120120212123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220000116 + ... + 220000661.

It is an arithmetic number, because the mean of its divisors is an integer number (12320021784).

Almost surely, 2^120120212121 is an apocalyptic number.

It is an amenable number.

120120212121 is a deficient number, since it is larger than the sum of its proper divisors (77000136423).

120120212121 is a wasteful number, since it uses less digits than its factorization.

120120212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440000800.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 120120212121 its reverse (121212021021), we get a palindrome (241332233142).

The spelling of 120120212121 in words is "one hundred twenty billion, one hundred twenty million, two hundred twelve thousand, one hundred twenty-one".