113213421 has 12 divisors (see below), whose sum is σ = 173150172. Its totient is φ = 71035776.

The previous prime is 113213413. The next prime is 113213431. The reversal of 113213421 is 124312311.

113213421 is a `hidden beast` number, since 1 + 1 + 321 + 342 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 44555625 + 68657796 = 6675^2 + 8286^2 .

It is not a de Polignac number, because 113213421 - 2³ = 113213413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 113213394 and 113213403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113213431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 369826 + ... + 370131.

It is an arithmetic number, because the mean of its divisors is an integer number (14429181).

Almost surely, 2^113213421 is an apocalyptic number.

It is an amenable number.

113213421 is a deficient number, since it is larger than the sum of its proper divisors (59936751).

113213421 is a wasteful number, since it uses less digits than its factorization.

113213421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739980 (or 739977 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 113213421 is about 10640.1795567556. The cubic root of 113213421 is about 483.7629878531.

Adding to 113213421 its reverse (124312311), we get a palindrome (237525732).

The spelling of 113213421 in words is "one hundred thirteen million, two hundred thirteen thousand, four hundred twenty-one".