22111021061 has 2 divisors, whose sum is σ = 22111021062. Its totient is φ = 22111021060.

The previous prime is 22111021007. The next prime is 22111021067. The reversal of 22111021061 is 16012011122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15751756036 + 6359265025 = 125506^2 + 79745^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22111021061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22111021067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11055510530 + 11055510531.

It is an arithmetic number, because the mean of its divisors is an integer number (11055510531).

Almost surely, 2^22111021061 is an apocalyptic number.

It is an amenable number.

22111021061 is a deficient number, since it is larger than the sum of its proper divisors (1).

22111021061 is an equidigital number, since it uses as much as digits as its factorization.

22111021061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 22111021061 its reverse (16012011122), we get a palindrome (38123032183).

The spelling of 22111021061 in words is "twenty-two billion, one hundred eleven million, twenty-one thousand, sixty-one".