21102122210969 has 2 divisors, whose sum is σ = 21102122210970. Its totient is φ = 21102122210968.

The previous prime is 21102122210867. The next prime is 21102122211043. The reversal of 21102122210969 is 96901222120112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21001249274944 + 100872936025 = 4582712^2 + 317605^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21102122210969 is a prime.

It is a super-2 number, since 2×21102122210969² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21102122200969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551061105484 + 10551061105485.

It is an arithmetic number, because the mean of its divisors is an integer number (10551061105485).

Almost surely, 2^{21102122210969} is an apocalyptic number.

It is an amenable number.

21102122210969 is a deficient number, since it is larger than the sum of its proper divisors (1).

21102122210969 is an equidigital number, since it uses as much as digits as its factorization.

21102122210969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 38.

The spelling of 21102122210969 in words is "twenty-one trillion, one hundred two billion, one hundred twenty-two million, two hundred ten thousand, nine hundred sixty-nine".