21322101197 has 2 divisors, whose sum is σ = 21322101198. Its totient is φ = 21322101196.

The previous prime is 21322101181. The next prime is 21322101253. The reversal of 21322101197 is 79110122312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17579842921 + 3742258276 = 132589^2 + 61174^2 .

It is a cyclic number.

It is not a de Polignac number, because 21322101197 - 2⁴ = 21322101181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21322101107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661050598 + 10661050599.

It is an arithmetic number, because the mean of its divisors is an integer number (10661050599).

Almost surely, 2^21322101197 is an apocalyptic number.

It is an amenable number.

21322101197 is a deficient number, since it is larger than the sum of its proper divisors (1).

21322101197 is an equidigital number, since it uses as much as digits as its factorization.

21322101197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 29.

The spelling of 21322101197 in words is "twenty-one billion, three hundred twenty-two million, one hundred one thousand, one hundred ninety-seven".