113212040420 has 12 divisors (see below), whose sum is σ = 237745284924. Its totient is φ = 45284816160.

The previous prime is 113212040387. The next prime is 113212040519. The reversal of 113212040420 is 24040212311.

It can be written as a sum of positive squares in 2 ways, for example, as 16053903616 + 97158136804 = 126704^2 + 311702^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 5660602021 = 113212040420 / (1 + 1 + 3 + 2 + 1 + 2 + 0 + 4 + 0 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 113212040392 and 113212040401.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2830300991 + ... + 2830301030.

It is an arithmetic number, because the mean of its divisors is an integer number (19812107077).

Almost surely, 2^113212040420 is an apocalyptic number.

113212040420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

113212040420 is an abundant number, since it is smaller than the sum of its proper divisors (124533244504).

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

113212040420 is a wasteful number, since it uses less digits than its factorization.

113212040420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5660602030 (or 5660602028 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 113212040420 its reverse (24040212311), we get a palindrome (137252252731).

The spelling of 113212040420 in words is "one hundred thirteen billion, two hundred twelve million, forty thousand, four hundred twenty".