21226214254 has 12 divisors (see below), whose sum is σ = 37037578104. Its totient is φ = 9096948924.

The previous prime is 21226214179. The next prime is 21226214281. The reversal of 21226214254 is 45241262212.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 108296914 + ... + 108297109.

It is an arithmetic number, because the mean of its divisors is an integer number (3086464842).

Almost surely, 2^21226214254 is an apocalyptic number.

21226214254 is a deficient number, since it is larger than the sum of its proper divisors (15811363850).

21226214254 is a wasteful number, since it uses less digits than its factorization.

21226214254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216594039 (or 216594032 counting only the distinct ones).

The product of its digits is 15360, while the sum is 31.

Adding to 21226214254 its reverse (45241262212), we get a palindrome (66467476466).

The spelling of 21226214254 in words is "twenty-one billion, two hundred twenty-six million, two hundred fourteen thousand, two hundred fifty-four".