21223330090 has 16 divisors (see below), whose sum is σ = 38231381160. Its totient is φ = 8482801600.

The previous prime is 21223330061. The next prime is 21223330091. The reversal of 21223330090 is 9003332212.

It can be written as a sum of positive squares in 4 ways, for example, as 6001445961 + 15221884129 = 77469^2 + 123377^2 .

It is not an unprimeable number, because it can be changed into a prime (21223330091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 802645 + ... + 828664.

Almost surely, 2^21223330090 is an apocalyptic number.

21223330090 is a deficient number, since it is larger than the sum of its proper divisors (17008051070).

21223330090 is a wasteful number, since it uses less digits than its factorization.

21223330090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632617.

The product of its (nonzero) digits is 1944, while the sum is 25.

The spelling of 21223330090 in words is "twenty-one billion, two hundred twenty-three million, three hundred thirty thousand, ninety".