21122110010 has 16 divisors (see below), whose sum is σ = 38177560872. Its totient is φ = 8413785600.

The previous prime is 21122110001. The next prime is 21122110013. The reversal of 21122110010 is 1001122112.

It can be written as a sum of positive squares in 4 ways, for example, as 12937470049 + 8184639961 = 113743^2 + 90469^2 .

It is a super-2 number, since 2×21122110010² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21122109973 and 21122110000.

It is not an unprimeable number, because it can be changed into a prime (21122110013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4379771 + ... + 4384590.

Almost surely, 2^21122110010 is an apocalyptic number.

21122110010 is a deficient number, since it is larger than the sum of its proper divisors (17055450862).

21122110010 is a wasteful number, since it uses less digits than its factorization.

21122110010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8764609.

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

Adding to 21122110010 its reverse (1001122112), we get a palindrome (22123232122).

The spelling of 21122110010 in words is "twenty-one billion, one hundred twenty-two million, one hundred ten thousand, ten".