11211212121112 has 32 divisors (see below), whose sum is σ = 22439045779200. Its totient is φ = 5235777338400.

The previous prime is 11211212121097. The next prime is 11211212121163. The reversal of 11211212121112 is 21112121211211.

It is a super-2 number, since 2×11211212121112² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 11211212121112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 519411564 + ... + 519433147.

It is an arithmetic number, because the mean of its divisors is an integer number (701220180600).

Almost surely, 2^{11211212121112} is an apocalyptic number.

It is an amenable number.

11211212121112 is an abundant number, since it is smaller than the sum of its proper divisors (11227833658088).

11211212121112 is a wasteful number, since it uses less digits than its factorization.

11211212121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038844807 (or 1038844803 counting only the distinct ones).

The product of its digits is 32, while the sum is 19.

Adding to 11211212121112 its reverse (21112121211211), we get a palindrome (32323333332323).

Subtracting 11211212121112 from its reverse (21112121211211), we obtain a palindrome (9900909090099).

The spelling of 11211212121112 in words is "eleven trillion, two hundred eleven billion, two hundred twelve million, one hundred twenty-one thousand, one hundred twelve".