90212012 has 12 divisors (see below), whose sum is σ = 172223016. Its totient is φ = 41005440.

The previous prime is 90212009. The next prime is 90212027. The reversal of 90212012 is 21021209.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1025093 + ... + 1025180.

It is an arithmetic number, because the mean of its divisors is an integer number (14351918).

Almost surely, 2^90212012 is an apocalyptic number.

It is an amenable number.

90212012 is a deficient number, since it is larger than the sum of its proper divisors (82011004).

90212012 is a wasteful number, since it uses less digits than its factorization.

90212012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050288 (or 2050286 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 90212012 is about 9498.0004211413. Note that the first 3 decimals coincide. The cubic root of 90212012 is about 448.4920918788.

The spelling of 90212012 in words is "ninety million, two hundred twelve thousand, twelve".