121200122211001 has 16 divisors (see below), whose sum is σ = 128513498097600. Its totient is φ = 113980401799488.

The previous prime is 121200122210929. The next prime is 121200122211067. The reversal of 121200122211001 is 100112221002121.

It is a cyclic number.

It is not a de Polignac number, because 121200122211001 - 2¹⁹ = 121200121686713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121200122211401) 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, 17528151 + ... + 23444323.

It is an arithmetic number, because the mean of its divisors is an integer number (8032093631100).

Almost surely, 2^{121200122211001} is an apocalyptic number.

It is an amenable number.

121200122211001 is a deficient number, since it is larger than the sum of its proper divisors (7313375886599).

121200122211001 is a wasteful number, since it uses less digits than its factorization.

121200122211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5924088.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121200122211001 its reverse (100112221002121), we get a palindrome (221312343213122).

The spelling of 121200122211001 in words is "one hundred twenty-one trillion, two hundred billion, one hundred twenty-two million, two hundred eleven thousand, one".