90020221212 has 24 divisors (see below), whose sum is σ = 210057530256. Its totient is φ = 30005262208.

The previous prime is 90020221141. The next prime is 90020221241. The reversal of 90020221212 is 21212202009.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84688 + ... + 432680.

It is an arithmetic number, because the mean of its divisors is an integer number (8752397094).

Almost surely, 2^90020221212 is an apocalyptic number.

It is an amenable number.

90020221212 is an abundant number, since it is smaller than the sum of its proper divisors (120037309044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90020221212 is a wasteful number, since it uses less digits than its factorization.

90020221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369557 (or 369555 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The spelling of 90020221212 in words is "ninety billion, twenty million, two hundred twenty-one thousand, two hundred twelve".