21000221011010 has 16 divisors (see below), whose sum is σ = 37832083002936. Its totient is φ = 8393047252608.

The previous prime is 21000221011009. The next prime is 21000221011027. The reversal of 21000221011010 is 1011012200012.

It can be written as a sum of positive squares in 4 ways, for example, as 12628335927769 + 8371885083241 = 3553637^2 + 2893421^2 .

It is a super-2 number, since 2×21000221011010² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21000221010982 and 21000221011000.

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, 880131449 + ... + 880155308.

Almost surely, 2^{21000221011010} is an apocalyptic number.

21000221011010 is a deficient number, since it is larger than the sum of its proper divisors (16831861991926).

21000221011010 is a wasteful number, since it uses less digits than its factorization.

21000221011010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760287957.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21000221011010 its reverse (1011012200012), we get a palindrome (22011233211022).

The spelling of 21000221011010 in words is "twenty-one trillion, two hundred twenty-one million, eleven thousand, ten".