12210451 has 4 divisors (see below), whose sum is σ = 13320504. Its totient is φ = 11100400.

The previous prime is 12210449. The next prime is 12210461. The reversal of 12210451 is 15401221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12210451 - 2¹ = 12210449 is a prime.

It is a super-2 number, since 2×12210451² = 298190227246802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12210461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555010 + ... + 555031.

It is an arithmetic number, because the mean of its divisors is an integer number (3330126).

Almost surely, 2^12210451 is an apocalyptic number.

12210451 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12210451 is a deficient number, since it is larger than the sum of its proper divisors (1110053).

12210451 is a wasteful number, since it uses less digits than its factorization.

12210451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110052.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 12210451 is about 3494.3455753546. The cubic root of 12210451 is about 230.2734680407.

Adding to 12210451 its reverse (15401221), we get a palindrome (27611672).

The spelling of 12210451 in words is "twelve million, two hundred ten thousand, four hundred fifty-one".