2210121200020 has 24 divisors (see below), whose sum is σ = 4641594640200. Its totient is φ = 883983695232.

The previous prime is 2210121200009. The next prime is 2210121200039. The reversal of 2210121200020 is 200021210122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 348048081936 + 1862073118084 = 589956^2 + 1364578^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3768835 + ... + 4315594.

It is an arithmetic number, because the mean of its divisors is an integer number (193399776675).

Almost surely, 2^{2210121200020} is an apocalyptic number.

2210121200020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2210121200020 is an abundant number, since it is smaller than the sum of its proper divisors (2431473440180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2210121200020 is a wasteful number, since it uses less digits than its factorization.

2210121200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8098107 (or 8098105 counting only the distinct ones).

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

Adding to 2210121200020 its reverse (200021210122), we get a palindrome (2410142410142).

The spelling of 2210121200020 in words is "two trillion, two hundred ten billion, one hundred twenty-one million, two hundred thousand, twenty".