2210121200021 has 64 divisors (see below), whose sum is σ = 2747852149248. Its totient is φ = 1734832816128.

The previous prime is 2210121200009. The next prime is 2210121200039. The reversal of 2210121200021 is 1200021210122.

It is not a de Polignac number, because 2210121200021 - 2¹⁰ = 2210121198997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2210121199969 and 2210121200005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2210121200051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 193983701 + ... + 193995093.

It is an arithmetic number, because the mean of its divisors is an integer number (42935189832).

Almost surely, 2^{2210121200021} is an apocalyptic number.

It is an amenable number.

2210121200021 is a deficient number, since it is larger than the sum of its proper divisors (537730949227).

2210121200021 is a wasteful number, since it uses less digits than its factorization.

2210121200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11790.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2210121200021 its reverse (1200021210122), we get a palindrome (3410142410143).

It can be divided in two parts, 2210121 and 200021, that added together give a palindrome (2410142).

The spelling of 2210121200021 in words is "two trillion, two hundred ten billion, one hundred twenty-one million, two hundred thousand, twenty-one".