21201092 has 12 divisors (see below), whose sum is σ = 40474896. Its totient is φ = 9636840.

The previous prime is 21201083. The next prime is 21201109. The reversal of 21201092 is 29010212.

It is a self number, because there is not a number n which added to its sum of digits gives 21201092.

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, 240878 + ... + 240965.

It is an arithmetic number, because the mean of its divisors is an integer number (3372908).

Almost surely, 2^21201092 is an apocalyptic number.

21201092 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21201092 is a deficient number, since it is larger than the sum of its proper divisors (19273804).

21201092 is a wasteful number, since it uses less digits than its factorization.

21201092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481858 (or 481856 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 21201092 is about 4604.4643553838. The cubic root of 21201092 is about 276.7702526587.

The spelling of 21201092 in words is "twenty-one million, two hundred one thousand, ninety-two".