21302131222191 has 8 divisors (see below), whose sum is σ = 29095593864624. Its totient is φ = 13855044697280.

The previous prime is 21302131222181. The next prime is 21302131222241. The reversal of 21302131222191 is 19122213120312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21302131222191 - 2⁵ = 21302131222159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21302131222121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86594029236 + ... + 86594029481.

It is an arithmetic number, because the mean of its divisors is an integer number (3636949233078).

Almost surely, 2^{21302131222191} is an apocalyptic number.

21302131222191 is a deficient number, since it is larger than the sum of its proper divisors (7793462642433).

21302131222191 is a wasteful number, since it uses less digits than its factorization.

21302131222191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173188058761.

The product of its (nonzero) digits is 2592, while the sum is 30.

The spelling of 21302131222191 in words is "twenty-one trillion, three hundred two billion, one hundred thirty-one million, two hundred twenty-two thousand, one hundred ninety-one".