120121211121 has 8 divisors (see below), whose sum is σ = 160165227264. Its totient is φ = 80079001200.

The previous prime is 120121211033. The next prime is 120121211143. The reversal of 120121211121 is 121112121021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 120121211121 - 2⁹ = 120121210609 is a prime.

It is a super-2 number, since 2×120121211121² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 120121211121.

It is not an unprimeable number, because it can be changed into a prime (120121211921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287905 + ... + 568446.

It is an arithmetic number, because the mean of its divisors is an integer number (20020653408).

Almost surely, 2^120121211121 is an apocalyptic number.

It is an amenable number.

120121211121 is a deficient number, since it is larger than the sum of its proper divisors (40044016143).

120121211121 is an equidigital number, since it uses as much as digits as its factorization.

120121211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903111.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 120121211121 its reverse (121112121021), we get a palindrome (241233332142).

The spelling of 120121211121 in words is "one hundred twenty billion, one hundred twenty-one million, two hundred eleven thousand, one hundred twenty-one".