113121421 has 8 divisors (see below), whose sum is σ = 136086080. Its totient is φ = 91857888.

The previous prime is 113121409. The next prime is 113121461. The reversal of 113121421 is 124121311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 113121421 - 2¹¹ = 113119373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113121395 and 113121404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113121401) 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, 425136 + ... + 425401.

It is an arithmetic number, because the mean of its divisors is an integer number (17010760).

Almost surely, 2^113121421 is an apocalyptic number.

It is an amenable number.

113121421 is a deficient number, since it is larger than the sum of its proper divisors (22964659).

113121421 is an equidigital number, since it uses as much as digits as its factorization.

113121421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850563.

The product of its digits is 48, while the sum is 16.

The square root of 113121421 is about 10635.8554427935. The cubic root of 113121421 is about 483.6319131226.

Adding to 113121421 its reverse (124121311), we get a palindrome (237242732).

The spelling of 113121421 in words is "one hundred thirteen million, one hundred twenty-one thousand, four hundred twenty-one".