221122211121193 has 2 divisors, whose sum is σ = 221122211121194. Its totient is φ = 221122211121192.

The previous prime is 221122211121181. The next prime is 221122211121223. The reversal of 221122211121193 is 391121112221122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200635978147609 + 20486232973584 = 14164603^2 + 4526172^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221122211121193 is a prime.

It is a super-2 number, since 2×221122211121193² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221122211121593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110561105560596 + 110561105560597.

It is an arithmetic number, because the mean of its divisors is an integer number (110561105560597).

Almost surely, 2^{221122211121193} is an apocalyptic number.

It is an amenable number.

221122211121193 is a deficient number, since it is larger than the sum of its proper divisors (1).

221122211121193 is an equidigital number, since it uses as much as digits as its factorization.

221122211121193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 31.

The spelling of 221122211121193 in words is "two hundred twenty-one trillion, one hundred twenty-two billion, two hundred eleven million, one hundred twenty-one thousand, one hundred ninety-three".