21444001213222 has 16 divisors (see below), whose sum is σ = 36762553658880. Its totient is φ = 9189934053768.

The previous prime is 21444001213211. The next prime is 21444001213253. The reversal of 21444001213222 is 22231210044412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28969822 + ... + 29700817.

It is an arithmetic number, because the mean of its divisors is an integer number (2297659603680).

Almost surely, 2^{21444001213222} is an apocalyptic number.

21444001213222 is a deficient number, since it is larger than the sum of its proper divisors (15318552445658).

21444001213222 is a wasteful number, since it uses less digits than its factorization.

21444001213222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58696755.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 21444001213222 its reverse (22231210044412), we get a palindrome (43675211257634).

The spelling of 21444001213222 in words is "twenty-one trillion, four hundred forty-four billion, one million, two hundred thirteen thousand, two hundred twenty-two".