12402221451 has 16 divisors (see below), whose sum is σ = 16713166080. Its totient is φ = 8179869600.

The previous prime is 12402221417. The next prime is 12402221471. The reversal of 12402221451 is 15412220421.

It is not a de Polignac number, because 12402221451 - 2³¹ = 10254737803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12402221411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 305665 + ... + 343853.

It is an arithmetic number, because the mean of its divisors is an integer number (1044572880).

Almost surely, 2^12402221451 is an apocalyptic number.

12402221451 is a deficient number, since it is larger than the sum of its proper divisors (4310944629).

12402221451 is a wasteful number, since it uses less digits than its factorization.

12402221451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39346.

The product of its (nonzero) digits is 1280, while the sum is 24.

Adding to 12402221451 its reverse (15412220421), we get a palindrome (27814441872).

The spelling of 12402221451 in words is "twelve billion, four hundred two million, two hundred twenty-one thousand, four hundred fifty-one".