221211210110 has 32 divisors (see below), whose sum is σ = 434404101600. Its totient is φ = 80435676160.

The previous prime is 221211210071. The next prime is 221211210131. The reversal of 221211210110 is 11012112122.

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, 2191226 + ... + 2289954.

It is an arithmetic number, because the mean of its divisors is an integer number (13575128175).

Almost surely, 2^221211210110 is an apocalyptic number.

221211210110 is a deficient number, since it is larger than the sum of its proper divisors (213192891490).

221211210110 is a wasteful number, since it uses less digits than its factorization.

221211210110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119116.

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

Adding to 221211210110 its reverse (11012112122), we get a palindrome (232223322232).

It can be divided in two parts, 2212112 and 10110, that added together give a palindrome (2222222).

The spelling of 221211210110 in words is "two hundred twenty-one billion, two hundred eleven million, two hundred ten thousand, one hundred ten".