22110100022221 has 2 divisors, whose sum is σ = 22110100022222. Its totient is φ = 22110100022220.

The previous prime is 22110100022203. The next prime is 22110100022261. The reversal of 22110100022221 is 12222000101122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16075977984196 + 6034122038025 = 4009486^2 + 2456445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22110100022221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22110100022195 and 22110100022204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22110100022261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11055050011110 + 11055050011111.

It is an arithmetic number, because the mean of its divisors is an integer number (11055050011111).

Almost surely, 2^{22110100022221} is an apocalyptic number.

It is an amenable number.

22110100022221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22110100022221 is an equidigital number, since it uses as much as digits as its factorization.

22110100022221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22110100022221 its reverse (12222000101122), we get a palindrome (34332100123343).

The spelling of 22110100022221 in words is "twenty-two trillion, one hundred ten billion, one hundred million, twenty-two thousand, two hundred twenty-one".