111212120120120 has 32 divisors (see below), whose sum is σ = 261106716805920. Its totient is φ = 42550724219520.

The previous prime is 111212120120119. The next prime is 111212120120137. The reversal of 111212120120120 is 21021021212111.

It is a super-2 number, since 2×111212120120120² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60441368711 + ... + 60441370550.

It is an arithmetic number, because the mean of its divisors is an integer number (8159584900185).

Almost surely, 2^{111212120120120} is an apocalyptic number.

111212120120120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111212120120120 is an abundant number, since it is smaller than the sum of its proper divisors (149894596685800).

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

111212120120120 is a wasteful number, since it uses less digits than its factorization.

111212120120120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120882739295 (or 120882739291 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111212120120120 its reverse (21021021212111), we get a palindrome (132233141332231).

The spelling of 111212120120120 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred twenty million, one hundred twenty thousand, one hundred twenty".