11112121210000 has 50 divisors (see below), whose sum is σ = 26903556685742. Its totient is φ = 4444848480000.

The previous prime is 11112121209949. The next prime is 11112121210007. The reversal of 11112121210000 is 1212121111.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 3103741921536 + 8008379288464 = 1761744^2 + 2829908^2 .

It is a tau number, because it is divible by the number of its divisors (50).

It is not an unprimeable number, because it can be changed into a prime (11112121210007) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 555596061 + ... + 555616060.

Almost surely, 2^{11112121210000} is an apocalyptic number.

11112121210000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11112121210000 is an abundant number, since it is smaller than the sum of its proper divisors (15791435475742).

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

11112121210000 is an equidigital number, since it uses as much as digits as its factorization.

11112121210000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111212149 (or 1111212128 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11112121210000 its reverse (1212121111), we get a palindrome (11113333331111).

The spelling of 11112121210000 in words is "eleven trillion, one hundred twelve billion, one hundred twenty-one million, two hundred ten thousand".