121200222010121 has 16 divisors (see below), whose sum is σ = 127505577081600. Its totient is φ = 115036632617088.

The previous prime is 121200222010117. The next prime is 121200222010123. The reversal of 121200222010121 is 121010222002121.

It is not a de Polignac number, because 121200222010121 - 2² = 121200222010117 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 121200222010121.

It is not an unprimeable number, because it can be changed into a prime (121200222010123) 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, 426894605 + ... + 427178421.

It is an arithmetic number, because the mean of its divisors is an integer number (7969098567600).

Almost surely, 2^{121200222010121} is an apocalyptic number.

It is an amenable number.

121200222010121 is a deficient number, since it is larger than the sum of its proper divisors (6305355071479).

121200222010121 is a wasteful number, since it uses less digits than its factorization.

121200222010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533488.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121200222010121 its reverse (121010222002121), we get a palindrome (242210444012242).

The spelling of 121200222010121 in words is "one hundred twenty-one trillion, two hundred billion, two hundred twenty-two million, ten thousand, one hundred twenty-one".