226021461221 has 2 divisors, whose sum is σ = 226021461222. Its totient is φ = 226021461220.

The previous prime is 226021461209. The next prime is 226021461251. The reversal of 226021461221 is 122164120622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164795402500 + 61226058721 = 405950^2 + 247439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-226021461221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (226021461251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113010730610 + 113010730611.

It is an arithmetic number, because the mean of its divisors is an integer number (113010730611).

Almost surely, 2^226021461221 is an apocalyptic number.

It is an amenable number.

226021461221 is a deficient number, since it is larger than the sum of its proper divisors (1).

226021461221 is an equidigital number, since it uses as much as digits as its factorization.

226021461221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 29.

Adding to 226021461221 its reverse (122164120622), we get a palindrome (348185581843).

The spelling of 226021461221 in words is "two hundred twenty-six billion, twenty-one million, four hundred sixty-one thousand, two hundred twenty-one".