221101222121022 has 16 divisors (see below), whose sum is σ = 444672848960640. Its totient is φ = 73288673253912.

The previous prime is 221101222120969. The next prime is 221101222121023. The reversal of 221101222121022 is 220121222101122.

It is a self number, because there is not a number n which added to its sum of digits gives 221101222121022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221101222121023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102933528778 + ... + 102933530925.

It is an arithmetic number, because the mean of its divisors is an integer number (27792053060040).

Almost surely, 2^{221101222121022} is an apocalyptic number.

221101222121022 is an abundant number, since it is smaller than the sum of its proper divisors (223571626839618).

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

221101222121022 is a wasteful number, since it uses less digits than its factorization.

221101222121022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205867059887.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 221101222121022 its reverse (220121222101122), we get a palindrome (441222444222144).

The spelling of 221101222121022 in words is "two hundred twenty-one trillion, one hundred one billion, two hundred twenty-two million, one hundred twenty-one thousand, twenty-two".