113212121101 has 4 divisors (see below), whose sum is σ = 113244554304. Its totient is φ = 113179687900.

The previous prime is 113212121083. The next prime is 113212121111. The reversal of 113212121101 is 101121212311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 113212121101 - 2³³ = 104622186509 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 (113212121111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16211365 + ... + 16218346.

It is an arithmetic number, because the mean of its divisors is an integer number (28311138576).

Almost surely, 2^113212121101 is an apocalyptic number.

It is an amenable number.

113212121101 is a deficient number, since it is larger than the sum of its proper divisors (32433203).

113212121101 is an equidigital number, since it uses as much as digits as its factorization.

113212121101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32433202.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 113212121101 its reverse (101121212311), we get a palindrome (214333333412).

The spelling of 113212121101 in words is "one hundred thirteen billion, two hundred twelve million, one hundred twenty-one thousand, one hundred one".