2121200220210 has 16 divisors (see below), whose sum is σ = 5090880528576. Its totient is φ = 565653392048.

The previous prime is 2121200220187. The next prime is 2121200220241. The reversal of 2121200220210 is 120220021212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2121200220210.

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, 35353336974 + ... + 35353337033.

It is an arithmetic number, because the mean of its divisors is an integer number (318180033036).

Almost surely, 2^{2121200220210} is an apocalyptic number.

2121200220210 is an abundant number, since it is smaller than the sum of its proper divisors (2969680308366).

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

2121200220210 is a wasteful number, since it uses less digits than its factorization.

2121200220210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70706674017.

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

Adding to 2121200220210 its reverse (120220021212), we get a palindrome (2241420241422).

The spelling of 2121200220210 in words is "two trillion, one hundred twenty-one billion, two hundred million, two hundred twenty thousand, two hundred ten".