226643151021 has 12 divisors (see below), whose sum is σ = 351528152832. Its totient is φ = 129510371928.

The previous prime is 226643151019. The next prime is 226643151061. The reversal of 226643151021 is 120151346622.

It is not a de Polignac number, because 226643151021 - 2¹ = 226643151019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226643151061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 770894925 + ... + 770895218.

It is an arithmetic number, because the mean of its divisors is an integer number (29294012736).

Almost surely, 2^226643151021 is an apocalyptic number.

226643151021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

226643151021 is a deficient number, since it is larger than the sum of its proper divisors (124885001811).

226643151021 is a wasteful number, since it uses less digits than its factorization.

226643151021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1541790160 (or 1541790153 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

Adding to 226643151021 its reverse (120151346622), we get a palindrome (346794497643).

The spelling of 226643151021 in words is "two hundred twenty-six billion, six hundred forty-three million, one hundred fifty-one thousand, twenty-one".