21112102010 has 16 divisors (see below), whose sum is σ = 38004411816. Its totient is φ = 8444256768.

The previous prime is 21112102007. The next prime is 21112102027. The reversal of 21112102010 is 1020121112.

It can be written as a sum of positive squares in 4 ways, for example, as 20900195761 + 211906249 = 144569^2 + 14557^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21112101982 and 21112102000.

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, 97862 + ... + 227598.

Almost surely, 2^21112102010 is an apocalyptic number.

21112102010 is a deficient number, since it is larger than the sum of its proper divisors (16892309806).

21112102010 is a wasteful number, since it uses less digits than its factorization.

21112102010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146017.

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

Adding to 21112102010 its reverse (1020121112), we get a palindrome (22132223122).

The spelling of 21112102010 in words is "twenty-one billion, one hundred twelve million, one hundred two thousand, ten".