21102343120097 has 4 divisors (see below), whose sum is σ = 21369461387520. Its totient is φ = 20835224852676.

The previous prime is 21102343120063. The next prime is 21102343120121. The reversal of 21102343120097 is 79002134320112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21102343120097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21102343120597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133559133593 + ... + 133559133750.

It is an arithmetic number, because the mean of its divisors is an integer number (5342365346880).

Almost surely, 2^{21102343120097} is an apocalyptic number.

It is an amenable number.

21102343120097 is a deficient number, since it is larger than the sum of its proper divisors (267118267423).

21102343120097 is an equidigital number, since it uses as much as digits as its factorization.

21102343120097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267118267422.

The product of its (nonzero) digits is 18144, while the sum is 35.

The spelling of 21102343120097 in words is "twenty-one trillion, one hundred two billion, three hundred forty-three million, one hundred twenty thousand, ninety-seven".