111221001212 has 24 divisors (see below), whose sum is σ = 206985940560. Its totient is φ = 52110731520.

The previous prime is 111221001211. The next prime is 111221001239. The reversal of 111221001212 is 212100122111.

It is a super-2 number, since 2×111221001212² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221001211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3555614 + ... + 3586757.

It is an arithmetic number, because the mean of its divisors is an integer number (8624414190).

Almost surely, 2^111221001212 is an apocalyptic number.

It is an amenable number.

111221001212 is a deficient number, since it is larger than the sum of its proper divisors (95764939348).

111221001212 is a wasteful number, since it uses less digits than its factorization.

111221001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7142621 (or 7142619 counting only the distinct ones).

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

Adding to 111221001212 its reverse (212100122111), we get a palindrome (323321123323).

The spelling of 111221001212 in words is "one hundred eleven billion, two hundred twenty-one million, one thousand, two hundred twelve".