113133021221 has 16 divisors (see below), whose sum is σ = 126772708608. Its totient is φ = 100066156800.

The previous prime is 113133021191. The next prime is 113133021259. The reversal of 113133021221 is 122120331311.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113133021221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113133021193 and 113133021202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113133021121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176240 + ... + 507273.

It is an arithmetic number, because the mean of its divisors is an integer number (7923294288).

Almost surely, 2^113133021221 is an apocalyptic number.

113133021221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

113133021221 is a deficient number, since it is larger than the sum of its proper divisors (13639687387).

113133021221 is a wasteful number, since it uses less digits than its factorization.

113133021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683932.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 113133021221 its reverse (122120331311), we get a palindrome (235253352532).

The spelling of 113133021221 in words is "one hundred thirteen billion, one hundred thirty-three million, twenty-one thousand, two hundred twenty-one".