113111022221 has 2 divisors, whose sum is σ = 113111022222. Its totient is φ = 113111022220.

The previous prime is 113111022209. The next prime is 113111022229. The reversal of 113111022221 is 122220111311.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105372301321 + 7738720900 = 324611^2 + 87970^2 .

It is an emirp because it is prime and its reverse (122220111311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 113111022221 - 2¹⁰ = 113111021197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 113111022221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113111022229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56555511110 + 56555511111.

It is an arithmetic number, because the mean of its divisors is an integer number (56555511111).

Almost surely, 2^113111022221 is an apocalyptic number.

It is an amenable number.

113111022221 is a deficient number, since it is larger than the sum of its proper divisors (1).

113111022221 is an equidigital number, since it uses as much as digits as its factorization.

113111022221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 113111022221 its reverse (122220111311), we get a palindrome (235331133532).

The spelling of 113111022221 in words is "one hundred thirteen billion, one hundred eleven million, twenty-two thousand, two hundred twenty-one".