211221110110 has 16 divisors (see below), whose sum is σ = 380232398016. Its totient is φ = 84480799648.

The previous prime is 211221110101. The next prime is 211221110147. The reversal of 211221110110 is 11011122112.

It is a happy number.

It is a super-2 number, since 2×211221110110² (a number of 23 digits) contains 22 as substring.

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, 838822 + ... + 1061161.

It is an arithmetic number, because the mean of its divisors is an integer number (23764524876).

Almost surely, 2^211221110110 is an apocalyptic number.

211221110110 is a deficient number, since it is larger than the sum of its proper divisors (169011287906).

211221110110 is a wasteful number, since it uses less digits than its factorization.

211221110110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1911107.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 211221110110 its reverse (11011122112), we get a palindrome (222232232222).

The spelling of 211221110110 in words is "two hundred eleven billion, two hundred twenty-one million, one hundred ten thousand, one hundred ten".