113220401221 has 2 divisors, whose sum is σ = 113220401222. Its totient is φ = 113220401220.

The previous prime is 113220401213. The next prime is 113220401267. The reversal of 113220401221 is 122104022311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108973272321 + 4247128900 = 330111^2 + 65170^2 .

It is an emirp because it is prime and its reverse (122104022311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 113220401221 - 2³ = 113220401213 is a prime.

It is a super-3 number, since 3×113220401221³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113220401201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56610200610 + 56610200611.

It is an arithmetic number, because the mean of its divisors is an integer number (56610200611).

Almost surely, 2^113220401221 is an apocalyptic number.

It is an amenable number.

113220401221 is a deficient number, since it is larger than the sum of its proper divisors (1).

113220401221 is an equidigital number, since it uses as much as digits as its factorization.

113220401221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 113220401221 its reverse (122104022311), we get a palindrome (235324423532).

The spelling of 113220401221 in words is "one hundred thirteen billion, two hundred twenty million, four hundred one thousand, two hundred twenty-one".