21221044442032 has 40 divisors (see below), whose sum is σ = 41893603146720. Its totient is φ = 10409811709440.

The previous prime is 21221044442029. The next prime is 21221044442053. The reversal of 21221044442032 is 23024444012212.

It is a junction number, because it is equal to n+sod(n) for n = 21221044441985 and 21221044442003.

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, 16932469 + ... + 18142507.

It is an arithmetic number, because the mean of its divisors is an integer number (1047340078668).

Almost surely, 2^{21221044442032} is an apocalyptic number.

It is an amenable number.

21221044442032 is a deficient number, since it is larger than the sum of its proper divisors (20672558704688).

21221044442032 is a wasteful number, since it uses less digits than its factorization.

21221044442032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230781 (or 1230775 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 21221044442032 its reverse (23024444012212), we get a palindrome (44245488454244).

The spelling of 21221044442032 in words is "twenty-one trillion, two hundred twenty-one billion, forty-four million, four hundred forty-two thousand, thirty-two".