11100212121020 has 96 divisors (see below), whose sum is σ = 26879977958400. Its totient is φ = 3807996192000.

The previous prime is 11100212120999. The next prime is 11100212121023. The reversal of 11100212121020 is 2012121200111.

It is a junction number, because it is equal to n+sod(n) for n = 11100212120986 and 11100212121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100212121023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4556531 + ... + 6554570.

It is an arithmetic number, because the mean of its divisors is an integer number (279999770400).

Almost surely, 2^{11100212121020} is an apocalyptic number.

11100212121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11100212121020 is an abundant number, since it is smaller than the sum of its proper divisors (15779765837380).

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

11100212121020 is a wasteful number, since it uses less digits than its factorization.

11100212121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11111379 (or 11111377 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11100212121020 its reverse (2012121200111), we get a palindrome (13112333321131).

The spelling of 11100212121020 in words is "eleven trillion, one hundred billion, two hundred twelve million, one hundred twenty-one thousand, twenty".