21221000211110 has 16 divisors (see below), whose sum is σ = 43654629005856. Its totient is φ = 7275771500928.

The previous prime is 21221000210981. The next prime is 21221000211121. The reversal of 21221000211110 is 1111200012212.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151578572867 + ... + 151578573006.

It is an arithmetic number, because the mean of its divisors is an integer number (2728414312866).

Almost surely, 2^{21221000211110} is an apocalyptic number.

21221000211110 is an abundant number, since it is smaller than the sum of its proper divisors (22433628794746).

21221000211110 is a wasteful number, since it uses less digits than its factorization.

21221000211110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303157145887.

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

Adding to 21221000211110 its reverse (1111200012212), we get a palindrome (22332200223322).

The spelling of 21221000211110 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred eleven thousand, one hundred ten".