11101212121000 has 64 divisors (see below), whose sum is σ = 26026506492480. Its totient is φ = 4431994228800.

The previous prime is 11101212120991. The next prime is 11101212121007. The reversal of 11101212121000 is 12121210111.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (11101212121007) 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, 10090014 + ... + 11136013.

It is an arithmetic number, because the mean of its divisors is an integer number (406664163945).

Almost surely, 2^{11101212121000} is an apocalyptic number.

11101212121000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11101212121000 is an abundant number, since it is smaller than the sum of its proper divisors (14925294371480).

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

11101212121000 is a wasteful number, since it uses less digits than its factorization.

11101212121000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21226571 (or 21226557 counting only the distinct ones).

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

Adding to 11101212121000 its reverse (12121210111), we get a palindrome (11113333331111).

The spelling of 11101212121000 in words is "eleven trillion, one hundred one billion, two hundred twelve million, one hundred twenty-one thousand".