111231421000 has 192 divisors, whose sum is σ = 303316256880. Its totient is φ = 38068531200.

The previous prime is 111231420991. The next prime is 111231421087. The reversal of 111231421000 is 124132111.

It can be written as a sum of positive squares in 8 ways, for example, as 19556903716 + 91674517284 = 139846^2 + 302778^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32975314 + ... + 32978686.

Almost surely, 2^111231421000 is an apocalyptic number.

111231421000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111231421000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151658128440).

111231421000 is an abundant number, since it is smaller than the sum of its proper divisors (192084835880).

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

111231421000 is a wasteful number, since it uses less digits than its factorization.

111231421000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4081 (or 4060 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 111231421000 its reverse (124132111), we get a palindrome (111355553111).

The spelling of 111231421000 in words is "one hundred eleven billion, two hundred thirty-one million, four hundred twenty-one thousand".