21010212110 has 32 divisors (see below), whose sum is σ = 40721706720. Its totient is φ = 7775660032.

The previous prime is 21010212073. The next prime is 21010212133. The reversal of 21010212110 is 1121201012.

It is a junction number, because it is equal to n+sod(n) for n = 21010212091 and 21010212100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1037339 + ... + 1057398.

It is an arithmetic number, because the mean of its divisors is an integer number (1272553335).

Almost surely, 2^21010212110 is an apocalyptic number.

21010212110 is a deficient number, since it is larger than the sum of its proper divisors (19711494610).

21010212110 is a wasteful number, since it uses less digits than its factorization.

21010212110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2094820.

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

Adding to 21010212110 its reverse (1121201012), we get a palindrome (22131413122).

The spelling of 21010212110 in words is "twenty-one billion, ten million, two hundred twelve thousand, one hundred ten".