221021122010 has 64 divisors (see below), whose sum is σ = 432366469920. Its totient is φ = 81344540160.

The previous prime is 221021121953. The next prime is 221021122031. The reversal of 221021122010 is 10221120122.

It can be written as a sum of positive squares in 16 ways, for example, as 85809742489 + 135211379521 = 292933^2 + 367711^2 .

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 31 ways as a sum of consecutive naturals, for example, 6860540 + ... + 6892680.

Almost surely, 2^221021122010 is an apocalyptic number.

221021122010 is a deficient number, since it is larger than the sum of its proper divisors (211345347910).

221021122010 is a wasteful number, since it uses less digits than its factorization.

221021122010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32500 (or 32474 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221021122010 its reverse (10221120122), we get a palindrome (231242242132).

The spelling of 221021122010 in words is "two hundred twenty-one billion, twenty-one million, one hundred twenty-two thousand, ten".