111223312400 has 30 divisors (see below), whose sum is σ = 267214009002. Its totient is φ = 44489324800.

The previous prime is 111223312391. The next prime is 111223312411. The reversal of 111223312400 is 4213322111.

It can be written as a sum of positive squares in 3 ways, for example, as 35560907776 + 75662404624 = 188576^2 + 275068^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 139028741 + ... + 139029540.

Almost surely, 2^111223312400 is an apocalyptic number.

111223312400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111223312400 is an abundant number, since it is smaller than the sum of its proper divisors (155990696602).

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

111223312400 is a wasteful number, since it uses less digits than its factorization.

111223312400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278058299 (or 278058288 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 111223312400 its reverse (4213322111), we get a palindrome (115436634511).

The spelling of 111223312400 in words is "one hundred eleven billion, two hundred twenty-three million, three hundred twelve thousand, four hundred".