221111110010 has 32 divisors (see below), whose sum is σ = 454888317312. Its totient is φ = 75804327360.

The previous prime is 221111110009. The next prime is 221111110013. The reversal of 221111110010 is 10011111122.

It is a junction number, because it is equal to n+sod(n) for n = 221111109973 and 221111110000.

It is not an unprimeable number, because it can be changed into a prime (221111110013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1000925 + ... + 1201695.

It is an arithmetic number, because the mean of its divisors is an integer number (14215259916).

Almost surely, 2^221111110010 is an apocalyptic number.

221111110010 is an abundant number, since it is smaller than the sum of its proper divisors (233777207302).

221111110010 is a wasteful number, since it uses less digits than its factorization.

221111110010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216518.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 221111110010 its reverse (10011111122), we get a palindrome (231122221132).

The spelling of 221111110010 in words is "two hundred twenty-one billion, one hundred eleven million, one hundred ten thousand, ten".