11112122121012 has 60 divisors (see below), whose sum is σ = 31690126058976. Its totient is φ = 3367309732560.

The previous prime is 11112122120941. The next prime is 11112122121013. The reversal of 11112122121012 is 21012122121111.

It is a happy number.

11112122121012 is a `hidden beast` number, since 111 + 121 + 221 + 210 + 1 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112122121013) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1558936128 + ... + 1558943255.

Almost surely, 2^{11112122121012} is an apocalyptic number.

11112122121012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11112122121012 is an abundant number, since it is smaller than the sum of its proper divisors (20578003937964).

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

11112122121012 is a wasteful number, since it uses less digits than its factorization.

11112122121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3117879410 (or 3117879399 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11112122121012 its reverse (21012122121111), we get a palindrome (32124244242123).

Subtracting 11112122121012 from its reverse (21012122121111), we obtain a palindrome (9900000000099).

The spelling of 11112122121012 in words is "eleven trillion, one hundred twelve billion, one hundred twenty-two million, one hundred twenty-one thousand, twelve".