111421543000 has 64 divisors (see below), whose sum is σ = 260929861920. Its totient is φ = 44533840000.

The previous prime is 111421542979. The next prime is 111421543027. The reversal of 111421543000 is 345124111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1258179 + ... + 1343821.

Almost surely, 2^111421543000 is an apocalyptic number.

111421543000 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 111421543000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130464930960).

111421543000 is an abundant number, since it is smaller than the sum of its proper divisors (149508318920).

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

111421543000 is a wasteful number, since it uses less digits than its factorization.

111421543000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86965 (or 86951 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 111421543000 its reverse (345124111), we get a palindrome (111766667111).

The spelling of 111421543000 in words is "one hundred eleven billion, four hundred twenty-one million, five hundred forty-three thousand".