2102122200021 has 8 divisors (see below), whose sum is σ = 2802849599424. Its totient is φ = 1401404800320.

The previous prime is 2102122200001. The next prime is 2102122200041. The reversal of 2102122200021 is 1200022212012.

It is an interprime number because it is at equal distance from previous prime (2102122200001) and next prime (2102122200041).

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

It is not a de Polignac number, because 2102122200021 - 2⁹ = 2102122199509 is a prime.

It is a super-2 number, since 2×2102122200021² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102122200001) 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, 1994836 + ... + 2860701.

It is an arithmetic number, because the mean of its divisors is an integer number (350356199928).

Almost surely, 2^{2102122200021} is an apocalyptic number.

It is an amenable number.

2102122200021 is a deficient number, since it is larger than the sum of its proper divisors (700727399403).

2102122200021 is a wasteful number, since it uses less digits than its factorization.

2102122200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4999851.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2102122200021 its reverse (1200022212012), we get a palindrome (3302144412033).

The spelling of 2102122200021 in words is "two trillion, one hundred two billion, one hundred twenty-two million, two hundred thousand, twenty-one".