2210102020121 has 4 divisors (see below), whose sum is σ = 2212768006500. Its totient is φ = 2207436033744.

The previous prime is 2210102020109. The next prime is 2210102020151. The reversal of 2210102020121 is 1210202010122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 903792462400 + 1306309557721 = 950680^2 + 1142939^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2210102020121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2210102020096 and 2210102020105.

It is not an unprimeable number, because it can be changed into a prime (2210102020151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1332991946 + ... + 1332993603.

It is an arithmetic number, because the mean of its divisors is an integer number (553192001625).

Almost surely, 2^{2210102020121} is an apocalyptic number.

It is an amenable number.

2210102020121 is a deficient number, since it is larger than the sum of its proper divisors (2665986379).

2210102020121 is an equidigital number, since it uses as much as digits as its factorization.

2210102020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2665986378.

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

Adding to 2210102020121 its reverse (1210202010122), we get a palindrome (3420304030243).

Subtracting from 2210102020121 its reverse (1210202010122), we obtain a palindrome (999900009999).

The spelling of 2210102020121 in words is "two trillion, two hundred ten billion, one hundred two million, twenty thousand, one hundred twenty-one".