113121221221 has 8 divisors (see below), whose sum is σ = 114216933600. Its totient is φ = 112026561840.

The previous prime is 113121221207. The next prime is 113121221231. The reversal of 113121221221 is 122122121311.

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 113121221221 - 2¹⁷ = 113121090149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113121221231) 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 7 ways as a sum of consecutive naturals, for example, 46495 + ... + 477916.

It is an arithmetic number, because the mean of its divisors is an integer number (14277116700).

Almost surely, 2^113121221221 is an apocalyptic number.

It is an amenable number.

113121221221 is a deficient number, since it is larger than the sum of its proper divisors (1095712379).

113121221221 is a wasteful number, since it uses less digits than its factorization.

113121221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526499.

The product of its digits is 96, while the sum is 19.

Adding to 113121221221 its reverse (122122121311), we get a palindrome (235243342532).

The spelling of 113121221221 in words is "one hundred thirteen billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred twenty-one".