21110010212 has 6 divisors (see below), whose sum is σ = 36942517878. Its totient is φ = 10555005104.

The previous prime is 21110010199. The next prime is 21110010221. The reversal of 21110010212 is 21201001112.

It can be written as a sum of positive squares in only one way, i.e., 12729706276 + 8380303936 = 112826^2 + 91544^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21110010193 and 21110010202.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2638751273 + ... + 2638751280.

It is an arithmetic number, because the mean of its divisors is an integer number (6157086313).

Almost surely, 2^21110010212 is an apocalyptic number.

It is an amenable number.

21110010212 is a deficient number, since it is larger than the sum of its proper divisors (15832507666).

21110010212 is a wasteful number, since it uses less digits than its factorization.

21110010212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5277502557 (or 5277502555 counting only the distinct ones).

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

Adding to 21110010212 its reverse (21201001112), we get a palindrome (42311011324).

The spelling of 21110010212 in words is "twenty-one billion, one hundred ten million, ten thousand, two hundred twelve".