90000010212121 has 8 divisors (see below), whose sum is σ = 90891503039304. Its totient is φ = 89108525299200.

The previous prime is 90000010212059. The next prime is 90000010212157. The reversal of 90000010212121 is 12121201000009.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 31285720836496 + 58714289375625 = 5593364^2 + 7662525^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 90000010212121 - 2³³ = 89991420277529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90000010213121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22352355 + ... + 26069671.

It is an arithmetic number, because the mean of its divisors is an integer number (11361437879913).

Almost surely, 2^{90000010212121} is an apocalyptic number.

It is an amenable number.

90000010212121 is a deficient number, since it is larger than the sum of its proper divisors (891492827183).

90000010212121 is a wasteful number, since it uses less digits than its factorization.

90000010212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3957131.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 90000010212121 in words is "ninety trillion, ten million, two hundred twelve thousand, one hundred twenty-one".