21101302097 has 4 divisors (see below), whose sum is σ = 21104367600. Its totient is φ = 21098236596.

The previous prime is 21101302039. The next prime is 21101302099. The reversal of 21101302097 is 79020310112.

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 not a de Polignac number, because 21101302097 - 2³² = 16806334801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21101302099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1522403 + ... + 1536200.

It is an arithmetic number, because the mean of its divisors is an integer number (5276091900).

Almost surely, 2^21101302097 is an apocalyptic number.

It is an amenable number.

21101302097 is a deficient number, since it is larger than the sum of its proper divisors (3065503).

21101302097 is an equidigital number, since it uses as much as digits as its factorization.

21101302097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3065502.

The product of its (nonzero) digits is 756, while the sum is 26.

The spelling of 21101302097 in words is "twenty-one billion, one hundred one million, three hundred two thousand, ninety-seven".