21221201002010 has 16 divisors (see below), whose sum is σ = 38576361427272. Its totient is φ = 8404436040000.

The previous prime is 21221201002003. The next prime is 21221201002021. The reversal of 21221201002010 is 1020010212212.

It can be written as a sum of positive squares in 4 ways, for example, as 20653361892409 + 567839109601 = 4544597^2 + 753551^2 .

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 7 ways as a sum of consecutive naturals, for example, 10505544041 + ... + 10505546060.

Almost surely, 2^{21221201002010} is an apocalyptic number.

21221201002010 is a deficient number, since it is larger than the sum of its proper divisors (17355160425262).

21221201002010 is a wasteful number, since it uses less digits than its factorization.

21221201002010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21011090209.

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

Adding to 21221201002010 its reverse (1020010212212), we get a palindrome (22241211214222).

The spelling of 21221201002010 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred one million, two thousand, ten".