121122100001 has 16 divisors (see below), whose sum is σ = 143126766720. Its totient is φ = 100340142720.

The previous prime is 121122099949. The next prime is 121122100007. The reversal of 121122100001 is 100001221121.

It is a cyclic number.

It is not a de Polignac number, because 121122100001 - 2²² = 121117905697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121122100007) 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, 1941386 + ... + 2002803.

It is an arithmetic number, because the mean of its divisors is an integer number (8945422920).

Almost surely, 2^121122100001 is an apocalyptic number.

It is an amenable number.

121122100001 is a deficient number, since it is larger than the sum of its proper divisors (22004666719).

121122100001 is a wasteful number, since it uses less digits than its factorization.

121122100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3944344.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121122100001 its reverse (100001221121), we get a palindrome (221123321122).

The spelling of 121122100001 in words is "one hundred twenty-one billion, one hundred twenty-two million, one hundred thousand, one".