2001022122001 has 32 divisors (see below), whose sum is σ = 2362215875840. Its totient is φ = 1659215943936.

The previous prime is 2001022121993. The next prime is 2001022122059. The reversal of 2001022122001 is 1002212201002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2001022122001 - 2³ = 2001022121993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2001022122091) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43451950 + ... + 43497976.

It is an arithmetic number, because the mean of its divisors is an integer number (73819246120).

Almost surely, 2^{2001022122001} is an apocalyptic number.

It is an amenable number.

2001022122001 is a deficient number, since it is larger than the sum of its proper divisors (361193753839).

2001022122001 is a wasteful number, since it uses less digits than its factorization.

2001022122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47033.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2001022122001 its reverse (1002212201002), we get a palindrome (3003234323003).

The spelling of 2001022122001 in words is "two trillion, one billion, twenty-two million, one hundred twenty-two thousand, one".