111111121022120 has 32 divisors (see below), whose sum is σ = 258620712726600. Its totient is φ = 42911881221888.

The previous prime is 111111121022113. The next prime is 111111121022141. The reversal of 111111121022120 is 21220121111111.

It can be written as a sum of positive squares in 4 ways, for example, as 54094818786724 + 57016302235396 = 7354918^2 + 7550914^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47892723419 + ... + 47892725738.

Almost surely, 2^{111111121022120} is an apocalyptic number.

111111121022120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111111121022120 is an abundant number, since it is smaller than the sum of its proper divisors (147509591704480).

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

111111121022120 is a wasteful number, since it uses less digits than its factorization.

111111121022120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95785449197 (or 95785449193 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 111111121022120 its reverse (21220121111111), we get a palindrome (132331242133231).

The spelling of 111111121022120 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred twenty-one million, twenty-two thousand, one hundred twenty".