22111212202201 has 2 divisors, whose sum is σ = 22111212202202. Its totient is φ = 22111212202200.

The previous prime is 22111212202153. The next prime is 22111212202241. The reversal of 22111212202201 is 10220221211122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11914398572176 + 10196813630025 = 3451724^2 + 3193245^2 .

It is a cyclic number.

It is not a de Polignac number, because 22111212202201 - 2¹¹ = 22111212200153 is a prime.

It is a super-2 number, since 2×22111212202201² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22111212202241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11055606101100 + 11055606101101.

It is an arithmetic number, because the mean of its divisors is an integer number (11055606101101).

Almost surely, 2^{22111212202201} is an apocalyptic number.

It is an amenable number.

22111212202201 is a deficient number, since it is larger than the sum of its proper divisors (1).

22111212202201 is an equidigital number, since it uses as much as digits as its factorization.

22111212202201 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 22111212202201 its reverse (10220221211122), we get a palindrome (32331433413323).

The spelling of 22111212202201 in words is "twenty-two trillion, one hundred eleven billion, two hundred twelve million, two hundred two thousand, two hundred one".