120012221121 has 32 divisors (see below), whose sum is σ = 176956257408. Its totient is φ = 71893923840.

The previous prime is 120012221093. The next prime is 120012221177. The reversal of 120012221121 is 121122210021.

It is not a de Polignac number, because 120012221121 - 2⁶ = 120012221057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120012221121.

It is not an unprimeable number, because it can be changed into a prime (120012221221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29271 + ... + 490796.

It is an arithmetic number, because the mean of its divisors is an integer number (5529883044).

Almost surely, 2^120012221121 is an apocalyptic number.

It is an amenable number.

120012221121 is a deficient number, since it is larger than the sum of its proper divisors (56944036287).

120012221121 is a wasteful number, since it uses less digits than its factorization.

120012221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520241.

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

Adding to 120012221121 its reverse (121122210021), we get a palindrome (241134431142).

The spelling of 120012221121 in words is "one hundred twenty billion, twelve million, two hundred twenty-one thousand, one hundred twenty-one".