113121100221 has 8 divisors (see below), whose sum is σ = 154904569824. Its totient is φ = 73375848720.

The previous prime is 113121100217. The next prime is 113121100241. The reversal of 113121100221 is 122001121311.

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

It is not a de Polignac number, because 113121100221 - 2² = 113121100217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 113121100221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113121100201) 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, 509554395 + ... + 509554616.

It is an arithmetic number, because the mean of its divisors is an integer number (19363071228).

Almost surely, 2^113121100221 is an apocalyptic number.

It is an amenable number.

113121100221 is a deficient number, since it is larger than the sum of its proper divisors (41783469603).

113121100221 is a wasteful number, since it uses less digits than its factorization.

113121100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019109051.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 113121100221 its reverse (122001121311), we get a palindrome (235122221532).

The spelling of 113121100221 in words is "one hundred thirteen billion, one hundred twenty-one million, one hundred thousand, two hundred twenty-one".