2101221122001 has 16 divisors (see below), whose sum is σ = 2985638897664. Its totient is φ = 1311400414544.

The previous prime is 2101221121997. The next prime is 2101221122023. The reversal of 2101221122001 is 1002211221012.

It is not a de Polignac number, because 2101221122001 - 2² = 2101221121997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2101221122081) 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, 323959311 + ... + 323965796.

It is an arithmetic number, because the mean of its divisors is an integer number (186602431104).

Almost surely, 2^{2101221122001} is an apocalyptic number.

It is an amenable number.

2101221122001 is a deficient number, since it is larger than the sum of its proper divisors (884417775663).

2101221122001 is a wasteful number, since it uses less digits than its factorization.

2101221122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647925180.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2101221122001 its reverse (1002211221012), we get a palindrome (3103432343013).

It can be divided in two parts, 2101221 and 122001, that added together give a palindrome (2223222).

The spelling of 2101221122001 in words is "two trillion, one hundred one billion, two hundred twenty-one million, one hundred twenty-two thousand, one".