2001022100121 has 8 divisors (see below), whose sum is σ = 2910577600224. Its totient is φ = 1212740666720.

The previous prime is 2001022100057. The next prime is 2001022100173. The reversal of 2001022100121 is 1210012201002.

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

It is not a de Polignac number, because 2001022100121 - 2⁶ = 2001022100057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001022100097 and 2001022100106.

It is not an unprimeable number, because it can be changed into a prime (2001022600121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30318516636 + ... + 30318516701.

It is an arithmetic number, because the mean of its divisors is an integer number (363822200028).

Almost surely, 2^{2001022100121} is an apocalyptic number.

It is an amenable number.

2001022100121 is a deficient number, since it is larger than the sum of its proper divisors (909555500103).

2001022100121 is a wasteful number, since it uses less digits than its factorization.

2001022100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60637033351.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2001022100121 its reverse (1210012201002), we get a palindrome (3211034301123).

The spelling of 2001022100121 in words is "two trillion, one billion, twenty-two million, one hundred thousand, one hundred twenty-one".