21011122010 has 16 divisors (see below), whose sum is σ = 37934285472. Its totient is φ = 8379056400.

The previous prime is 21011122009. The next prime is 21011122049. The reversal of 21011122010 is 1022111012.

It is a junction number, because it is equal to n+sod(n) for n = 21011121982 and 21011122000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3170576 + ... + 3177195.

It is an arithmetic number, because the mean of its divisors is an integer number (2370892842).

Almost surely, 2^21011122010 is an apocalyptic number.

21011122010 is a deficient number, since it is larger than the sum of its proper divisors (16923163462).

21011122010 is a wasteful number, since it uses less digits than its factorization.

21011122010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6348109.

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

Adding to 21011122010 its reverse (1022111012), we get a palindrome (22033233022).

The spelling of 21011122010 in words is "twenty-one billion, eleven million, one hundred twenty-two thousand, ten".