21212003321024 has 28 divisors (see below), whose sum is σ = 42095900540568. Its totient is φ = 10605162240000.

The previous prime is 21212003321017. The next prime is 21212003321039. The reversal of 21212003321024 is 42012330021212.

It is a super-2 number, since 2×21212003321024² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12300602 + ... + 13918649.

It is an arithmetic number, because the mean of its divisors is an integer number (1503425019306).

Almost surely, 2^{21212003321024} is an apocalyptic number.

It is an amenable number.

21212003321024 is a deficient number, since it is larger than the sum of its proper divisors (20883897219544).

21212003321024 is a wasteful number, since it uses less digits than its factorization.

21212003321024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26231904 (or 26231894 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21212003321024 its reverse (42012330021212), we get a palindrome (63224333342236).

The spelling of 21212003321024 in words is "twenty-one trillion, two hundred twelve billion, three million, three hundred twenty-one thousand, twenty-four".