21111122212010 has 8 divisors (see below), whose sum is σ = 38000019981636. Its totient is φ = 8444448884800.

The previous prime is 21111122211997. The next prime is 21111122212097. The reversal of 21111122212010 is 1021222111112.

It can be written as a sum of positive squares in 2 ways, for example, as 18022206996049 + 3088915215961 = 4245257^2 + 1757531^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21111122212010.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055556110591 + ... + 1055556110610.

Almost surely, 2^{21111122212010} is an apocalyptic number.

21111122212010 is a deficient number, since it is larger than the sum of its proper divisors (16888897769626).

21111122212010 is a wasteful number, since it uses less digits than its factorization.

21111122212010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111112221208.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21111122212010 its reverse (1021222111112), we get a palindrome (22132344323122).

The spelling of 21111122212010 in words is "twenty-one trillion, one hundred eleven billion, one hundred twenty-two million, two hundred twelve thousand, ten".