21112010197 has 8 divisors (see below), whose sum is σ = 21795581952. Its totient is φ = 20428597200.

The previous prime is 21112010191. The next prime is 21112010207. The reversal of 21112010197 is 79101021112.

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 21112010197 - 2¹⁵ = 21111977429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112010191) 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, 268743 + ... + 338299.

It is an arithmetic number, because the mean of its divisors is an integer number (2724447744).

Almost surely, 2^21112010197 is an apocalyptic number.

It is an amenable number.

21112010197 is a deficient number, since it is larger than the sum of its proper divisors (683571755).

21112010197 is an equidigital number, since it uses as much as digits as its factorization.

21112010197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79379.

The product of its (nonzero) digits is 252, while the sum is 25.

The spelling of 21112010197 in words is "twenty-one billion, one hundred twelve million, ten thousand, one hundred ninety-seven".