2021220012210 has 64 divisors (see below), whose sum is σ = 5544030818304. Its totient is φ = 461983723200.

The previous prime is 2021220012199. The next prime is 2021220012211. The reversal of 2021220012210 is 122100221202.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2021220012210.

It is not an unprimeable number, because it can be changed into a prime (2021220012211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19939555 + ... + 20040665.

It is an arithmetic number, because the mean of its divisors is an integer number (86625481536).

Almost surely, 2^{2021220012210} is an apocalyptic number.

2021220012210 is an abundant number, since it is smaller than the sum of its proper divisors (3522810806094).

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

2021220012210 is a wasteful number, since it uses less digits than its factorization.

2021220012210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196319.

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

Adding to 2021220012210 its reverse (122100221202), we get a palindrome (2143320233412).

The spelling of 2021220012210 in words is "two trillion, twenty-one billion, two hundred twenty million, twelve thousand, two hundred ten".