111221212210012 has 24 divisors (see below), whose sum is σ = 194828818407552. Its totient is φ = 55555837138800.

The previous prime is 111221212209977. The next prime is 111221212210013. The reversal of 111221212210012 is 210012212122111.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221212210013) 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, 349106463 + ... + 349424905.

It is an arithmetic number, because the mean of its divisors is an integer number (8117867433648).

Almost surely, 2^{111221212210012} is an apocalyptic number.

It is an amenable number.

111221212210012 is a deficient number, since it is larger than the sum of its proper divisors (83607606197540).

111221212210012 is a wasteful number, since it uses less digits than its factorization.

111221212210012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404169 (or 404167 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 111221212210012 its reverse (210012212122111), we get a palindrome (321233424332123).

The spelling of 111221212210012 in words is "one hundred eleven trillion, two hundred twenty-one billion, two hundred twelve million, two hundred ten thousand, twelve".