900221122009 has 16 divisors (see below), whose sum is σ = 1025352889344. Its totient is φ = 782346272400.

The previous prime is 900221121997. The next prime is 900221122019.

900221122009 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 900221122009 - 2⁵ = 900221121977 is a prime.

It is a super-2 number, since 2×900221122009² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (900221122019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 596637 + ... + 1468474.

It is an arithmetic number, because the mean of its divisors is an integer number (64084555584).

Almost surely, 2^900221122009 is an apocalyptic number.

It is an amenable number.

900221122009 is a deficient number, since it is larger than the sum of its proper divisors (125131767335).

900221122009 is a wasteful number, since it uses less digits than its factorization.

900221122009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2066868.

The product of its (nonzero) digits is 1296, while the sum is 28.

The spelling of 900221122009 in words is "nine hundred billion, two hundred twenty-one million, one hundred twenty-two thousand, nine".