21000211221110 has 32 divisors (see below), whose sum is σ = 41252299024032. Its totient is φ = 7633566254080.

The previous prime is 21000211221083. The next prime is 21000211221151. The reversal of 21000211221110 is 1112211200012.

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, 35633777 + ... + 36218316.

It is an arithmetic number, because the mean of its divisors is an integer number (1289134344501).

Almost surely, 2^{21000211221110} is an apocalyptic number.

21000211221110 is a deficient number, since it is larger than the sum of its proper divisors (20252087802922).

21000211221110 is a wasteful number, since it uses less digits than its factorization.

21000211221110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71854768.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21000211221110 its reverse (1112211200012), we get a palindrome (22112422421122).

The spelling of 21000211221110 in words is "twenty-one trillion, two hundred eleven million, two hundred twenty-one thousand, one hundred ten".