122100002001 has 24 divisors (see below), whose sum is σ = 180419226624. Its totient is φ = 79535361600.

The previous prime is 122100001993. The next prime is 122100002047. The reversal of 122100002001 is 100200001221.

It is not a de Polignac number, because 122100002001 - 2³ = 122100001993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (122100003001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14080 + ... + 494366.

It is an arithmetic number, because the mean of its divisors is an integer number (7517467776).

Almost surely, 2^122100002001 is an apocalyptic number.

It is an amenable number.

122100002001 is a deficient number, since it is larger than the sum of its proper divisors (58319224623).

122100002001 is a wasteful number, since it uses less digits than its factorization.

122100002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480941 (or 480938 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 122100002001 its reverse (100200001221), we get a palindrome (222300003222).

The spelling of 122100002001 in words is "one hundred twenty-two billion, one hundred million, two thousand, one".