113211111280 has 40 divisors (see below), whose sum is σ = 263267524800. Its totient is φ = 45275551488.

The previous prime is 113211111253. The next prime is 113211111281. The reversal of 113211111280 is 82111112311.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113211111281) 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, 278761 + ... + 551479.

It is an arithmetic number, because the mean of its divisors is an integer number (6581688120).

Almost surely, 2^113211111280 is an apocalyptic number.

113211111280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

113211111280 is an abundant number, since it is smaller than the sum of its proper divisors (150056413520).

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

113211111280 is a wasteful number, since it uses less digits than its factorization.

113211111280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277921 (or 277915 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 22.

Adding to 113211111280 its reverse (82111112311), we get a palindrome (195322223591).

The spelling of 113211111280 in words is "one hundred thirteen billion, two hundred eleven million, one hundred eleven thousand, two hundred eighty".