12221451 has 12 divisors (see below), whose sum is σ = 19258200. Its totient is φ = 7406880.

The previous prime is 12221449. The next prime is 12221459. The reversal of 12221451 is 15412221.

It is not a de Polignac number, because 12221451 - 2¹ = 12221449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12221459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61626 + ... + 61823.

It is an arithmetic number, because the mean of its divisors is an integer number (1604850).

Almost surely, 2^12221451 is an apocalyptic number.

12221451 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12221451 is a deficient number, since it is larger than the sum of its proper divisors (7036749).

12221451 is a wasteful number, since it uses less digits than its factorization.

12221451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123466 (or 123463 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 12221451 is about 3495.9191924299. The cubic root of 12221451 is about 230.3425959240.

Adding to 12221451 its reverse (15412221), we get a palindrome (27633672).

It can be divided in two parts, 122214 and 51, that added together give a triangular number (122265 = T₄₉₄).

The spelling of 12221451 in words is "twelve million, two hundred twenty-one thousand, four hundred fifty-one".