21022212123097 has 2 divisors, whose sum is σ = 21022212123098. Its totient is φ = 21022212123096.

The previous prime is 21022212123071. The next prime is 21022212123131. The reversal of 21022212123097 is 79032121222012.

It is an a-pointer prime, because the next prime (21022212123131) can be obtained adding 21022212123097 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16163785017241 + 4858427105856 = 4020421^2 + 2204184^2 .

It is a cyclic number.

It is not a de Polignac number, because 21022212123097 - 2⁷ = 21022212122969 is a prime.

It is not a weakly prime, because it can be changed into another prime (21022212223097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511106061548 + 10511106061549.

It is an arithmetic number, because the mean of its divisors is an integer number (10511106061549).

Almost surely, 2^{21022212123097} is an apocalyptic number.

It is an amenable number.

21022212123097 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022212123097 is an equidigital number, since it uses as much as digits as its factorization.

21022212123097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The spelling of 21022212123097 in words is "twenty-one trillion, twenty-two billion, two hundred twelve million, one hundred twenty-three thousand, ninety-seven".