21422000122440 has 64 divisors (see below), whose sum is σ = 64266893458560. Its totient is φ = 5712453980160.

The previous prime is 21422000122363. The next prime is 21422000122463. The reversal of 21422000122440 is 4422100022412.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 21422000122440.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7697925 + ... + 10104555.

It is an arithmetic number, because the mean of its divisors is an integer number (1004170210290).

Almost surely, 2^{21422000122440} is an apocalyptic number.

21422000122440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21422000122440 is an abundant number, since it is smaller than the sum of its proper divisors (42844893336120).

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

21422000122440 is a wasteful number, since it uses less digits than its factorization.

21422000122440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2480822 (or 2480818 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 21422000122440 its reverse (4422100022412), we get a palindrome (25844100144852).

The spelling of 21422000122440 in words is "twenty-one trillion, four hundred twenty-two billion, one hundred twenty-two thousand, four hundred forty".