21227901 has 8 divisors (see below), whose sum is σ = 29217024. Its totient is φ = 13695360.

The previous prime is 21227897. The next prime is 21227911. The reversal of 21227901 is 10972212.

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

It is not a de Polignac number, because 21227901 - 2² = 21227897 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21227911) 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, 114036 + ... + 114221.

It is an arithmetic number, because the mean of its divisors is an integer number (3652128).

Almost surely, 2^21227901 is an apocalyptic number.

It is an amenable number.

21227901 is a deficient number, since it is larger than the sum of its proper divisors (7989123).

21227901 is a wasteful number, since it uses less digits than its factorization.

21227901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228291.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 21227901 is about 4607.3746320437. The cubic root of 21227901 is about 276.8868631360.

The spelling of 21227901 in words is "twenty-one million, two hundred twenty-seven thousand, nine hundred one".