900021122220021 has 8 divisors (see below), whose sum is σ = 1200028538923584. Its totient is φ = 600013893498240.

The previous prime is 900021122219983. The next prime is 900021122220029. The reversal of 900021122220021 is 120022221120009.

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

It is not a de Polignac number, because 900021122220021 - 2³⁰ = 900020048478197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 900021122219973 and 900021122220000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (900021122220029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35416321 + ... + 55266246.

It is an arithmetic number, because the mean of its divisors is an integer number (150003567365448).

Almost surely, 2^{900021122220021} is an apocalyptic number.

It is an amenable number.

900021122220021 is a deficient number, since it is larger than the sum of its proper divisors (300007416703563).

900021122220021 is a wasteful number, since it uses less digits than its factorization.

900021122220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93990891.

The product of its (nonzero) digits is 576, while the sum is 24.

The spelling of 900021122220021 in words is "nine hundred trillion, twenty-one billion, one hundred twenty-two million, two hundred twenty thousand, twenty-one".