121210231121 has 8 divisors (see below), whose sum is σ = 139796859840. Its totient is φ = 102941322768.

The previous prime is 121210231111. The next prime is 121210231187. The reversal of 121210231121 is 121132012121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 121210231121 - 2¹⁸ = 121209968977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121210231121.

It is not an unprimeable number, because it can be changed into a prime (121210231111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79429271 + ... + 79430796.

It is an arithmetic number, because the mean of its divisors is an integer number (17474607480).

Almost surely, 2^121210231121 is an apocalyptic number.

It is an amenable number.

121210231121 is a deficient number, since it is larger than the sum of its proper divisors (18586628719).

121210231121 is a wasteful number, since it uses less digits than its factorization.

121210231121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158860183.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 121210231121 its reverse (121132012121), we get a palindrome (242342243242).

The spelling of 121210231121 in words is "one hundred twenty-one billion, two hundred ten million, two hundred thirty-one thousand, one hundred twenty-one".