111221012 has 24 divisors (see below), whose sum is σ = 224200704. Its totient is φ = 47289312.

The previous prime is 111220999. The next prime is 111221023. The reversal of 111221012 is 210122111.

It is a super-2 number, since 2×111221012² = 24740227020608288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111220984 and 111221002.

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, 12083 + ... + 19194.

It is an arithmetic number, because the mean of its divisors is an integer number (9341696).

Almost surely, 2^111221012 is an apocalyptic number.

It is an amenable number.

111221012 is an abundant number, since it is smaller than the sum of its proper divisors (112979692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111221012 is a wasteful number, since it uses less digits than its factorization.

111221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31415 (or 31413 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 111221012 is about 10546.1373023491. The cubic root of 111221012 is about 480.9083090483.

Adding to 111221012 its reverse (210122111), we get a palindrome (321343123).

The spelling of 111221012 in words is "one hundred eleven million, two hundred twenty-one thousand, twelve".