121222100121 has 8 divisors (see below), whose sum is σ = 162335273280. Its totient is φ = 80461830192.

The previous prime is 121222100099. The next prime is 121222100147. The reversal of 121222100121 is 121001222121.

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

It is not a de Polignac number, because 121222100121 - 2⁷ = 121222099993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121222100121.

It is not an unprimeable number, because it can be changed into a prime (121222100171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88225005 + ... + 88226378.

It is an arithmetic number, because the mean of its divisors is an integer number (20291909160).

Almost surely, 2^121222100121 is an apocalyptic number.

It is an amenable number.

121222100121 is a deficient number, since it is larger than the sum of its proper divisors (41113173159).

121222100121 is a wasteful number, since it uses less digits than its factorization.

121222100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176451615.

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

Adding to 121222100121 its reverse (121001222121), we get a palindrome (242223322242).

The spelling of 121222100121 in words is "one hundred twenty-one billion, two hundred twenty-two million, one hundred thousand, one hundred twenty-one".