21421412412 has 24 divisors (see below), whose sum is σ = 50450432256. Its totient is φ = 7073737008.

The previous prime is 21421412407. The next prime is 21421412413.

It is a happy number.

21421412412 is nontrivially palindromic in base 10.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21421412413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8340388 + ... + 8342955.

It is an arithmetic number, because the mean of its divisors is an integer number (2102101344).

Almost surely, 2^21421412412 is an apocalyptic number.

It is an amenable number.

21421412412 is an abundant number, since it is smaller than the sum of its proper divisors (29029019844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21421412412 is a wasteful number, since it uses less digits than its factorization.

21421412412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16683457 (or 16683455 counting only the distinct ones).

The product of its digits is 1024, while the sum is 24.

The spelling of 21421412412 in words is "twenty-one billion, four hundred twenty-one million, four hundred twelve thousand, four hundred twelve".