21211294 has 8 divisors (see below), whose sum is σ = 34264440. Its totient is φ = 9789816.

The previous prime is 21211259. The next prime is 21211319. The reversal of 21211294 is 49211212.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 407884 + ... + 407935.

It is an arithmetic number, because the mean of its divisors is an integer number (4283055).

Almost surely, 2^21211294 is an apocalyptic number.

21211294 is a deficient number, since it is larger than the sum of its proper divisors (13053146).

21211294 is a wasteful number, since it uses less digits than its factorization.

21211294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815834.

The product of its digits is 288, while the sum is 22.

The square root of 21211294 is about 4605.5720600160. The cubic root of 21211294 is about 276.8146396386.

The spelling of 21211294 in words is "twenty-one million, two hundred eleven thousand, two hundred ninety-four".