21112097 has 8 divisors (see below), whose sum is σ = 22740960. Its totient is φ = 19535040.

The previous prime is 21112093. The next prime is 21112103. The reversal of 21112097 is 79021112.

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

It is not a de Polignac number, because 21112097 - 2² = 21112093 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112093) 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, 12104 + ... + 13737.

It is an arithmetic number, because the mean of its divisors is an integer number (2842620).

Almost surely, 2^21112097 is an apocalyptic number.

It is an amenable number.

21112097 is a deficient number, since it is larger than the sum of its proper divisors (1628863).

21112097 is a wasteful number, since it uses less digits than its factorization.

21112097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25903.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 21112097 is about 4594.7902019570. The cubic root of 21112097 is about 276.3824469478.

The spelling of 21112097 in words is "twenty-one million, one hundred twelve thousand, ninety-seven".