21122000121197 has 2 divisors, whose sum is σ = 21122000121198. Its totient is φ = 21122000121196.

The previous prime is 21122000121181. The next prime is 21122000121221. The reversal of 21122000121197 is 79112100022112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17553033053956 + 3568967067241 = 4189634^2 + 1889171^2 .

It is a cyclic number.

It is not a de Polignac number, because 21122000121197 - 2⁴ = 21122000121181 is a prime.

It is a super-2 number, since 2×21122000121197² (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 (21122000121107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561000060598 + 10561000060599.

It is an arithmetic number, because the mean of its divisors is an integer number (10561000060599).

Almost surely, 2^{21122000121197} is an apocalyptic number.

It is an amenable number.

21122000121197 is a deficient number, since it is larger than the sum of its proper divisors (1).

21122000121197 is an equidigital number, since it uses as much as digits as its factorization.

21122000121197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 29.

The spelling of 21122000121197 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred twenty-one thousand, one hundred ninety-seven".