22212909337781 has 2 divisors, whose sum is σ = 22212909337782. Its totient is φ = 22212909337780.

The previous prime is 22212909337693. The next prime is 22212909337897. The reversal of 22212909337781 is 18773390921222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17545970041681 + 4666939296100 = 4188791^2 + 2160310^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22212909337781 is a prime.

It is a super-2 number, since 2×22212909337781² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22212909337081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11106454668890 + 11106454668891.

It is an arithmetic number, because the mean of its divisors is an integer number (11106454668891).

Almost surely, 2^{22212909337781} is an apocalyptic number.

It is an amenable number.

22212909337781 is a deficient number, since it is larger than the sum of its proper divisors (1).

22212909337781 is an equidigital number, since it uses as much as digits as its factorization.

22212909337781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4572288, while the sum is 56.

The spelling of 22212909337781 in words is "twenty-two trillion, two hundred twelve billion, nine hundred nine million, three hundred thirty-seven thousand, seven hundred eighty-one".