21114297 has 8 divisors (see below), whose sum is σ = 31280480. Its totient is φ = 14076180.

The previous prime is 21114293. The next prime is 21114307. The reversal of 21114297 is 79241112.

It is not a de Polignac number, because 21114297 - 2² = 21114293 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 782011 = 21114297 / (2 + 1 + 1 + 1 + 4 + 2 + 9 + 7).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21114297.

It is not an unprimeable number, because it can be changed into a prime (21114293) 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, 390979 + ... + 391032.

It is an arithmetic number, because the mean of its divisors is an integer number (3910060).

Almost surely, 2^21114297 is an apocalyptic number.

21114297 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

21114297 is a deficient number, since it is larger than the sum of its proper divisors (10166183).

21114297 is an equidigital number, since it uses as much as digits as its factorization.

21114297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782020 (or 782014 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 21114297 is about 4595.0295972931. The cubic root of 21114297 is about 276.3920468195.

The spelling of 21114297 in words is "twenty-one million, one hundred fourteen thousand, two hundred ninety-seven".