11221212000999 has 128 divisors (see below), whose sum is σ = 21052307404800. Its totient is φ = 5235371366400.

The previous prime is 11221212000989. The next prime is 11221212001007. The reversal of 11221212000999 is 99900021212211.

It is a happy number.

It is not a de Polignac number, because 11221212000999 - 2⁹ = 11221212000487 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221212000989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4413919 + ... + 6474959.

It is an arithmetic number, because the mean of its divisors is an integer number (164471151600).

Almost surely, 2^{11221212000999} is an apocalyptic number.

11221212000999 is a deficient number, since it is larger than the sum of its proper divisors (9831095403801).

11221212000999 is a wasteful number, since it uses less digits than its factorization.

11221212000999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2061126 (or 2061112 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 39.

It can be divided in two parts, 1122 and 1212000999, that added together give a palindrome (1212002121).

The spelling of 11221212000999 in words is "eleven trillion, two hundred twenty-one billion, two hundred twelve million, nine hundred ninety-nine", and thus it is an aban number.