113220202021 has 4 divisors (see below), whose sum is σ = 113562257344. Its totient is φ = 112878146700.

The previous prime is 113220202001. The next prime is 113220202027. The reversal of 113220202021 is 120202022311.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120202022311 = 7 ⋅17171717473.

It is a cyclic number.

It is not a de Polignac number, because 113220202021 - 2¹⁵ = 113220169253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113220201986 and 113220202004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113220202027) 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 3 ways as a sum of consecutive naturals, for example, 171027165 + ... + 171027826.

It is an arithmetic number, because the mean of its divisors is an integer number (28390564336).

Almost surely, 2^113220202021 is an apocalyptic number.

It is an amenable number.

113220202021 is a deficient number, since it is larger than the sum of its proper divisors (342055323).

113220202021 is an equidigital number, since it uses as much as digits as its factorization.

113220202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342055322.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 113220202021 its reverse (120202022311), we get a palindrome (233422224332).

The spelling of 113220202021 in words is "one hundred thirteen billion, two hundred twenty million, two hundred two thousand, twenty-one".