900000021101 has 4 divisors (see below), whose sum is σ = 909278371932. Its totient is φ = 890721670272.

The previous prime is 900000021049. The next prime is 900000021119. The reversal of 900000021101 is 101120000009.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101120000009 = 7 ⋅14445714287.

It can be written as a sum of positive squares in 2 ways, for example, as 327103924900 + 572896096201 = 571930^2 + 756899^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-900000021101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (900000021301) 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, 4639175270 + ... + 4639175463.

It is an arithmetic number, because the mean of its divisors is an integer number (227319592983).

Almost surely, 2^900000021101 is an apocalyptic number.

It is an amenable number.

900000021101 is a deficient number, since it is larger than the sum of its proper divisors (9278350831).

900000021101 is an equidigital number, since it uses as much as digits as its factorization.

900000021101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9278350830.

The product of its (nonzero) digits is 18, while the sum is 14.

The spelling of 900000021101 in words is "nine hundred billion, twenty-one thousand, one hundred one".