111212221212110 has 96 divisors (see below), whose sum is σ = 203836571388000. Its totient is φ = 43685231040000.

The previous prime is 111212221212091. The next prime is 111212221212119. The reversal of 111212221212110 is 11212122212111.

It is a happy number.

It is a super-2 number, since 2×111212221212110² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111212221212119) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11232418160 + ... + 11232428060.

It is an arithmetic number, because the mean of its divisors is an integer number (2123297618625).

Almost surely, 2^{111212221212110} is an apocalyptic number.

111212221212110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111212221212110 is a deficient number, since it is larger than the sum of its proper divisors (92624350175890).

111212221212110 is a wasteful number, since it uses less digits than its factorization.

111212221212110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10998 (or 10897 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 111212221212110 its reverse (11212122212111), we get a palindrome (122424343424221).

The spelling of 111212221212110 in words is "one hundred eleven trillion, two hundred twelve billion, two hundred twenty-one million, two hundred twelve thousand, one hundred ten".