2021021221110 has 32 divisors (see below), whose sum is σ = 4941968876640. Its totient is φ = 528770331648.

The previous prime is 2021021221081. The next prime is 2021021221123. The reversal of 2021021221110 is 111221201202.

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 2021021221110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 635539675 + ... + 635542854.

It is an arithmetic number, because the mean of its divisors is an integer number (154436527395).

Almost surely, 2^{2021021221110} is an apocalyptic number.

2021021221110 is an abundant number, since it is smaller than the sum of its proper divisors (2920947655530).

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

2021021221110 is a wasteful number, since it uses less digits than its factorization.

2021021221110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271082592.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2021021221110 its reverse (111221201202), we get a palindrome (2132242422312).

The spelling of 2021021221110 in words is "two trillion, twenty-one billion, twenty-one million, two hundred twenty-one thousand, one hundred ten".