111221110010 has 16 divisors (see below), whose sum is σ = 207101377800. Its totient is φ = 42954359616.

The previous prime is 111221110003. The next prime is 111221110031. The reversal of 111221110010 is 10011122111.

It can be written as a sum of positive squares in 4 ways, for example, as 57126258121 + 54094851889 = 239011^2 + 232583^2 .

It is a junction number, because it is equal to n+sod(n) for n = 111221109973 and 111221110000.

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, 191760245 + ... + 191760824.

Almost surely, 2^111221110010 is an apocalyptic number.

111221110010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111221110010 is a deficient number, since it is larger than the sum of its proper divisors (95880267790).

111221110010 is a wasteful number, since it uses less digits than its factorization.

111221110010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383521105.

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

Adding to 111221110010 its reverse (10011122111), we get a palindrome (121232232121).

The spelling of 111221110010 in words is "one hundred eleven billion, two hundred twenty-one million, one hundred ten thousand, ten".