22111111221061 has 2 divisors, whose sum is σ = 22111111221062. Its totient is φ = 22111111221060.

The previous prime is 22111111221037. The next prime is 22111111221137. The reversal of 22111111221061 is 16012211111122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20197608930625 + 1913502290436 = 4494175^2 + 1383294^2 .

It is a cyclic number.

It is not a de Polignac number, because 22111111221061 - 2²³ = 22111102832453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22111111221461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11055555610530 + 11055555610531.

It is an arithmetic number, because the mean of its divisors is an integer number (11055555610531).

Almost surely, 2^{22111111221061} is an apocalyptic number.

It is an amenable number.

22111111221061 is a deficient number, since it is larger than the sum of its proper divisors (1).

22111111221061 is an equidigital number, since it uses as much as digits as its factorization.

22111111221061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 22.

Adding to 22111111221061 its reverse (16012211111122), we get a palindrome (38123322332183).

The spelling of 22111111221061 in words is "twenty-two trillion, one hundred eleven billion, one hundred eleven million, two hundred twenty-one thousand, sixty-one".