20221221002210 has 24 divisors (see below), whose sum is σ = 38414718464796. Its totient is φ = 7662778483680.

The previous prime is 20221221002027. The next prime is 20221221002261. The reversal of 20221221002210 is 1220012212202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17361547224961 + 2859673777249 = 4166719^2 + 1691057^2 .

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 11 ways as a sum of consecutive naturals, for example, 2800719521 + ... + 2800726740.

Almost surely, 2^{20221221002210} is an apocalyptic number.

20221221002210 is a deficient number, since it is larger than the sum of its proper divisors (18193497462586).

20221221002210 is a wasteful number, since it uses less digits than its factorization.

20221221002210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5601446306 (or 5601446287 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20221221002210 its reverse (1220012212202), we get a palindrome (21441233214412).

The spelling of 20221221002210 in words is "twenty trillion, two hundred twenty-one billion, two hundred twenty-one million, two thousand, two hundred ten".