11112121240 has 32 divisors (see below), whose sum is σ = 27275207760. Its totient is φ = 4040771200.

The previous prime is 11112121219. The next prime is 11112121259. The reversal of 11112121240 is 4212121111.

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, 12626971 + ... + 12627850.

Almost surely, 2^11112121240 is an apocalyptic number.

11112121240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11112121240 is an abundant number, since it is smaller than the sum of its proper divisors (16163086520).

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

11112121240 is a wasteful number, since it uses less digits than its factorization.

11112121240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25254843 (or 25254839 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11112121240 its reverse (4212121111), we get a palindrome (15324242351).

The spelling of 11112121240 in words is "eleven billion, one hundred twelve million, one hundred twenty-one thousand, two hundred forty".