222101111100021 has 128 divisors (see below), whose sum is σ = 346355274240000. Its totient is φ = 125766353534976.

The previous prime is 222101111100007. The next prime is 222101111100133. The reversal of 222101111100021 is 120001111101222.

It is a happy number.

It is not a de Polignac number, because 222101111100021 - 2¹⁷ = 222101110968949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222101111180021) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 631433826 + ... + 631785468.

It is an arithmetic number, because the mean of its divisors is an integer number (2705900580000).

Almost surely, 2^{222101111100021} is an apocalyptic number.

It is an amenable number.

222101111100021 is a deficient number, since it is larger than the sum of its proper divisors (124254163139979).

222101111100021 is a wasteful number, since it uses less digits than its factorization.

222101111100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352203.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 222101111100021 its reverse (120001111101222), we get a palindrome (342102222201243).

The spelling of 222101111100021 in words is "two hundred twenty-two trillion, one hundred one billion, one hundred eleven million, one hundred thousand, twenty-one".