11155761211212 has 60 divisors (see below), whose sum is σ = 29164095699816. Its totient is φ = 3718493697600.

The previous prime is 11155761211207. The next prime is 11155761211297. The reversal of 11155761211212 is 21211216755111.

11155761211212 is a `hidden beast` number, since 1 + 1 + 1 + 5 + 5 + 7 + 612 + 11 + 21 + 2 = 666.

11155761211212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13148368 + ... + 13971080.

Almost surely, 2^{11155761211212} is an apocalyptic number.

11155761211212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11155761211212 is an abundant number, since it is smaller than the sum of its proper divisors (18008334488604).

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

11155761211212 is a wasteful number, since it uses less digits than its factorization.

11155761211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864580 (or 864569 counting only the distinct ones).

The product of its digits is 8400, while the sum is 36.

Adding to 11155761211212 its reverse (21211216755111), we get a palindrome (32366977966323).

The spelling of 11155761211212 in words is "eleven trillion, one hundred fifty-five billion, seven hundred sixty-one million, two hundred eleven thousand, two hundred twelve".