11212121022000 has 80 divisors (see below), whose sum is σ = 36147878194272. Its totient is φ = 2989898937600.

The previous prime is 11212121021993. The next prime is 11212121022001. The reversal of 11212121022000 is 22012121211.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (11212121022001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 934337419 + ... + 934349418.

Almost surely, 2^{11212121022000} is an apocalyptic number.

11212121022000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11212121022000 is an abundant number, since it is smaller than the sum of its proper divisors (24935757172272).

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

11212121022000 is a wasteful number, since it uses less digits than its factorization.

11212121022000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1868686863 (or 1868686847 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11212121022000 its reverse (22012121211), we get a palindrome (11234133143211).

The spelling of 11212121022000 in words is "eleven trillion, two hundred twelve billion, one hundred twenty-one million, twenty-two thousand".