111220210121012 has 24 divisors (see below), whose sum is σ = 211110958384200. Its totient is φ = 51062363325440.

The previous prime is 111220210120993. The next prime is 111220210121021. The reversal of 111220210121012 is 210121012022111.

It can be written as a sum of positive squares in 4 ways, for example, as 105083595556 + 111115126525456 = 324166^2 + 10541116^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

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, 19946232887 + ... + 19946238462.

It is an arithmetic number, because the mean of its divisors is an integer number (8796289932675).

Almost surely, 2^{111220210121012} is an apocalyptic number.

It is an amenable number.

111220210121012 is a deficient number, since it is larger than the sum of its proper divisors (99890748263188).

111220210121012 is a wasteful number, since it uses less digits than its factorization.

111220210121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39892471411 (or 39892471409 counting only the distinct ones).

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

Adding to 111220210121012 its reverse (210121012022111), we get a palindrome (321341222143123).

The spelling of 111220210121012 in words is "one hundred eleven trillion, two hundred twenty billion, two hundred ten million, one hundred twenty-one thousand, twelve".