90012101 has 6 divisors (see below), whose sum is σ = 94999302. Its totient is φ = 85274280.

The previous prime is 90012077. The next prime is 90012103. The reversal of 90012101 is 10121009.

It can be written as a sum of positive squares in only one way, i.e., 81450625 + 8561476 = 9025^2 + 2926^2 .

It is not a de Polignac number, because 90012101 - 2⁶ = 90012037 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 (90012103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 124310 + ... + 125031.

It is an arithmetic number, because the mean of its divisors is an integer number (15833217).

Almost surely, 2^90012101 is an apocalyptic number.

It is an amenable number.

90012101 is a deficient number, since it is larger than the sum of its proper divisors (4987201).

90012101 is a wasteful number, since it uses less digits than its factorization.

90012101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249379 (or 249360 counting only the distinct ones).

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

The square root of 90012101 is about 9487.4707377678. The cubic root of 90012101 is about 448.1605587478.

The spelling of 90012101 in words is "ninety million, twelve thousand, one hundred one".