113221420020 has 36 divisors (see below), whose sum is σ = 343438307940. Its totient is φ = 30192378624.

The previous prime is 113221419991. The next prime is 113221420087. The reversal of 113221420020 is 20024122311.

It is a happy number.

113221420020 is a `hidden beast` number, since 1 + 1 + 3 + 221 + 420 + 0 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 27341945316 + 85879474704 = 165354^2 + 293052^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 113221419975 and 113221420002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 314503765 + ... + 314504124.

Almost surely, 2^113221420020 is an apocalyptic number.

113221420020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

113221420020 is an abundant number, since it is smaller than the sum of its proper divisors (230216887920).

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

113221420020 is a wasteful number, since it uses less digits than its factorization.

113221420020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629007904 (or 629007899 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 113221420020 its reverse (20024122311), we get a palindrome (133245542331).

The spelling of 113221420020 in words is "one hundred thirteen billion, two hundred twenty-one million, four hundred twenty thousand, twenty".