22221220111201 has 2 divisors, whose sum is σ = 22221220111202. Its totient is φ = 22221220111200.

The previous prime is 22221220111183. The next prime is 22221220111273. The reversal of 22221220111201 is 10211102212222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14826350250000 + 7394869861201 = 3850500^2 + 2719351^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22221220111201 is a prime.

It is not a weakly prime, because it can be changed into another prime (22221220111291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110610055600 + 11110610055601.

It is an arithmetic number, because the mean of its divisors is an integer number (11110610055601).

Almost surely, 2^{22221220111201} is an apocalyptic number.

It is an amenable number.

22221220111201 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221220111201 is an equidigital number, since it uses as much as digits as its factorization.

22221220111201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 22221220111201 its reverse (10211102212222), we get a palindrome (32432322323423).

The spelling of 22221220111201 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred twenty million, one hundred eleven thousand, two hundred one".