111220212021212 has 48 divisors (see below), whose sum is σ = 223241751237120. Its totient is φ = 47494199005632.

The previous prime is 111220212021199. The next prime is 111220212021227. The reversal of 111220212021212 is 212120212022111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22781873 + ... + 27229655.

It is an arithmetic number, because the mean of its divisors is an integer number (4650869817440).

Almost surely, 2^{111220212021212} is an apocalyptic number.

It is an amenable number.

111220212021212 is an abundant number, since it is smaller than the sum of its proper divisors (112021539215908).

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

111220212021212 is a wasteful number, since it uses less digits than its factorization.

111220212021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4451010 (or 4451008 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 111220212021212 its reverse (212120212022111), we get a palindrome (323340424043323).

The spelling of 111220212021212 in words is "one hundred eleven trillion, two hundred twenty billion, two hundred twelve million, twenty-one thousand, two hundred twelve".