113221442421 has 12 divisors (see below), whose sum is σ = 163549188972. Its totient is φ = 75477682176.

The previous prime is 113221442419. The next prime is 113221442423. The reversal of 113221442421 is 124244122311.

113221442421 is a `hidden beast` number, since 1 + 1 + 3 + 2 + 214 + 424 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (113221442419) and next prime (113221442423).

It can be written as a sum of positive squares in 2 ways, for example, as 63523657521 + 49697784900 = 252039^2 + 222930^2 .

It is not a de Polignac number, because 113221442421 - 2¹ = 113221442419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113221442423) by changing a digit.

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, 44556 + ... + 477941.

It is an arithmetic number, because the mean of its divisors is an integer number (13629099081).

Almost surely, 2^113221442421 is an apocalyptic number.

It is an amenable number.

113221442421 is a deficient number, since it is larger than the sum of its proper divisors (50327746551).

113221442421 is a wasteful number, since it uses less digits than its factorization.

113221442421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546580 (or 546577 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

Adding to 113221442421 its reverse (124244122311), we get a palindrome (237465564732).

The spelling of 113221442421 in words is "one hundred thirteen billion, two hundred twenty-one million, four hundred forty-two thousand, four hundred twenty-one".