111211121040 has 40 divisors (see below), whose sum is σ = 344754475968. Its totient is φ = 29656298880.

The previous prime is 111211121039. The next prime is 111211121071. The reversal of 111211121040 is 40121112111.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 231689596 + ... + 231690075.

Almost surely, 2^111211121040 is an apocalyptic number.

111211121040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111211121040 is an abundant number, since it is smaller than the sum of its proper divisors (233543354928).

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

111211121040 is a wasteful number, since it uses less digits than its factorization.

111211121040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463379687 (or 463379681 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111211121040 its reverse (40121112111), we get a palindrome (151332233151).

The spelling of 111211121040 in words is "one hundred eleven billion, two hundred eleven million, one hundred twenty-one thousand, forty".