21300213197 has 2 divisors, whose sum is σ = 21300213198. Its totient is φ = 21300213196.

The previous prime is 21300213167. The next prime is 21300213227. The reversal of 21300213197 is 79131200312.

It is a balanced prime because it is at equal distance from previous prime (21300213167) and next prime (21300213227).

It can be written as a sum of positive squares in only one way, i.e., 18501168361 + 2799044836 = 136019^2 + 52906^2 .

It is a cyclic number.

It is not a de Polignac number, because 21300213197 - 2⁶ = 21300213133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21300213127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10650106598 + 10650106599.

It is an arithmetic number, because the mean of its divisors is an integer number (10650106599).

Almost surely, 2^21300213197 is an apocalyptic number.

It is an amenable number.

21300213197 is a deficient number, since it is larger than the sum of its proper divisors (1).

21300213197 is an equidigital number, since it uses as much as digits as its factorization.

21300213197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 29.

The spelling of 21300213197 in words is "twenty-one billion, three hundred million, two hundred thirteen thousand, one hundred ninety-seven".