111020120121010 has 8 divisors (see below), whose sum is σ = 199836216217836. Its totient is φ = 44408048048400.

The previous prime is 111020120120999. The next prime is 111020120121023. The reversal of 111020120121010 is 10121021020111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 108632195846329 + 2387924274681 = 10422677^2 + 1545291^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5551006006041 + ... + 5551006006060.

Almost surely, 2^{111020120121010} is an apocalyptic number.

111020120121010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111020120121010 is a deficient number, since it is larger than the sum of its proper divisors (88816096096826).

111020120121010 is a wasteful number, since it uses less digits than its factorization.

111020120121010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11102012012108.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111020120121010 its reverse (10121021020111), we get a palindrome (121141141141121).

The spelling of 111020120121010 in words is "one hundred eleven trillion, twenty billion, one hundred twenty million, one hundred twenty-one thousand, ten".