21002112097 has 8 divisors (see below), whose sum is σ = 21689127680. Its totient is φ = 20315692080.

The previous prime is 21002112067. The next prime is 21002112101. The reversal of 21002112097 is 79021120012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21002112097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21002112017) 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 7 ways as a sum of consecutive naturals, for example, 76647 + ... + 218812.

It is an arithmetic number, because the mean of its divisors is an integer number (2711140960).

Almost surely, 2^21002112097 is an apocalyptic number.

It is an amenable number.

21002112097 is a deficient number, since it is larger than the sum of its proper divisors (687015583).

21002112097 is a wasteful number, since it uses less digits than its factorization.

21002112097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297783.

The product of its (nonzero) digits is 504, while the sum is 25.

The spelling of 21002112097 in words is "twenty-one billion, two million, one hundred twelve thousand, ninety-seven".