90121234012 has 6 divisors (see below), whose sum is σ = 157712159528. Its totient is φ = 45060617004.

The previous prime is 90121233997. The next prime is 90121234031. The reversal of 90121234012 is 21043212109.

It is a super-2 number, since 2×90121234012² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11265154248 + ... + 11265154255.

Almost surely, 2^90121234012 is an apocalyptic number.

It is an amenable number.

90121234012 is a deficient number, since it is larger than the sum of its proper divisors (67590925516).

90121234012 is a wasteful number, since it uses less digits than its factorization.

90121234012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22530308507 (or 22530308505 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 90121234012 in words is "ninety billion, one hundred twenty-one million, two hundred thirty-four thousand, twelve".