900112022021 has 4 divisors (see below), whose sum is σ = 900141799200. Its totient is φ = 900082244844.

The previous prime is 900112022009. The next prime is 900112022027. The reversal of 900112022021 is 120220211009.

It is a happy number.

900112022021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120220211009 = 109519 ⋅1097711.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-900112022021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 900112021984 and 900112022002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (900112022027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14843201 + ... + 14903718.

It is an arithmetic number, because the mean of its divisors is an integer number (225035449800).

Almost surely, 2^900112022021 is an apocalyptic number.

It is an amenable number.

900112022021 is a deficient number, since it is larger than the sum of its proper divisors (29777179).

900112022021 is a wasteful number, since it uses less digits than its factorization.

900112022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29777178.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 900112022021 in words is "nine hundred billion, one hundred twelve million, twenty-two thousand, twenty-one".