11209890012 has 12 divisors (see below), whose sum is σ = 26156410056. Its totient is φ = 3736630000.

The previous prime is 11209890011. The next prime is 11209890019. The reversal of 11209890012 is 21009890211.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×11209890012³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11209890011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 467078739 + ... + 467078762.

It is an arithmetic number, because the mean of its divisors is an integer number (2179700838).

Almost surely, 2^11209890012 is an apocalyptic number.

11209890012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11209890012 is an abundant number, since it is smaller than the sum of its proper divisors (14946520044).

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

11209890012 is a wasteful number, since it uses less digits than its factorization.

11209890012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934157508 (or 934157506 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 33.

The spelling of 11209890012 in words is "eleven billion, two hundred nine million, eight hundred ninety thousand, twelve".