21142322214442 has 16 divisors (see below), whose sum is σ = 37257798588192. Its totient is φ = 8870904425520.

The previous prime is 21142322214401. The next prime is 21142322214473. The reversal of 21142322214442 is 24441222324112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21142322214398 and 21142322214407.

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 7 ways as a sum of consecutive naturals, for example, 36962101488 + ... + 36962102059.

It is an arithmetic number, because the mean of its divisors is an integer number (2328612411762).

Almost surely, 2^{21142322214442} is an apocalyptic number.

21142322214442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21142322214442 is a deficient number, since it is larger than the sum of its proper divisors (16115476373750).

21142322214442 is a wasteful number, since it uses less digits than its factorization.

21142322214442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73924203573.

The product of its digits is 49152, while the sum is 34.

Adding to 21142322214442 its reverse (24441222324112), we get a palindrome (45583544538554).

The spelling of 21142322214442 in words is "twenty-one trillion, one hundred forty-two billion, three hundred twenty-two million, two hundred fourteen thousand, four hundred forty-two".