21222221110193 has 4 divisors (see below), whose sum is σ = 21222322733568. Its totient is φ = 21222119486820.

The previous prime is 21222221110171. The next prime is 21222221110229. The reversal of 21222221110193 is 39101112222212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21222221110193 - 2¹⁰ = 21222221109169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222221110793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50497793 + ... + 50916318.

It is an arithmetic number, because the mean of its divisors is an integer number (5305580683392).

Almost surely, 2^{21222221110193} is an apocalyptic number.

It is an amenable number.

21222221110193 is a deficient number, since it is larger than the sum of its proper divisors (101623375).

21222221110193 is a wasteful number, since it uses less digits than its factorization.

21222221110193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101623374.

The product of its (nonzero) digits is 1728, while the sum is 29.

The spelling of 21222221110193 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty-one million, one hundred ten thousand, one hundred ninety-three".