222101101221020 has 72 divisors (see below), whose sum is σ = 566242530828576. Its totient is φ = 71669599036416.

The previous prime is 222101101221019. The next prime is 222101101221029. The reversal of 222101101221020 is 20122101101222.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 222101101221020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222101101221029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2744659259 + ... + 2744740178.

Almost surely, 2^{222101101221020} is an apocalyptic number.

222101101221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222101101221020 is an abundant number, since it is smaller than the sum of its proper divisors (344141429607556).

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

222101101221020 is a wasteful number, since it uses less digits than its factorization.

222101101221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5489399487 (or 5489399468 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 222101101221020 its reverse (20122101101222), we get a palindrome (242223202322242).

The spelling of 222101101221020 in words is "two hundred twenty-two trillion, one hundred one billion, one hundred one million, two hundred twenty-one thousand, twenty".