22100021197 has 2 divisors, whose sum is σ = 22100021198. Its totient is φ = 22100021196.

The previous prime is 22100021161. The next prime is 22100021243. The reversal of 22100021197 is 79112000122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16830132361 + 5269888836 = 129731^2 + 72594^2 .

It is a cyclic number.

It is not a de Polignac number, because 22100021197 - 2¹⁵ = 22099988429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22100021107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11050010598 + 11050010599.

It is an arithmetic number, because the mean of its divisors is an integer number (11050010599).

Almost surely, 2^22100021197 is an apocalyptic number.

It is an amenable number.

22100021197 is a deficient number, since it is larger than the sum of its proper divisors (1).

22100021197 is an equidigital number, since it uses as much as digits as its factorization.

22100021197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 25.

The spelling of 22100021197 in words is "twenty-two billion, one hundred million, twenty-one thousand, one hundred ninety-seven".