111405220512 has 48 divisors (see below), whose sum is σ = 302522804640. Its totient is φ = 35854552832.

The previous prime is 111405220481. The next prime is 111405220513. The reversal of 111405220512 is 215022504111.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×111405220512² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (111405220513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20005338 + ... + 20010905.

It is an arithmetic number, because the mean of its divisors is an integer number (6302558430).

Almost surely, 2^111405220512 is an apocalyptic number.

111405220512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111405220512 is an abundant number, since it is smaller than the sum of its proper divisors (191117584128).

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

111405220512 is a wasteful number, since it uses less digits than its factorization.

111405220512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40016285 (or 40016277 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

Adding to 111405220512 its reverse (215022504111), we get a palindrome (326427724623).

The spelling of 111405220512 in words is "one hundred eleven billion, four hundred five million, two hundred twenty thousand, five hundred twelve".