21224202 has 16 divisors (see below), whose sum is σ = 42720672. Its totient is φ = 7029360.

The previous prime is 21224191. The next prime is 21224207. The reversal of 21224202 is 20242212.

It is not an unprimeable number, because it can be changed into a prime (21224207) 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, 10324 + ... + 12207.

It is an arithmetic number, because the mean of its divisors is an integer number (2670042).

Almost surely, 2^21224202 is an apocalyptic number.

21224202 is an abundant number, since it is smaller than the sum of its proper divisors (21496470).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21224202 is a wasteful number, since it uses less digits than its factorization.

21224202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22693.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 21224202 is about 4606.9731928892. The cubic root of 21224202 is about 276.8707795235.

Adding to 21224202 its reverse (20242212), we get a palindrome (41466414).

The spelling of 21224202 in words is "twenty-one million, two hundred twenty-four thousand, two hundred two".