111203123012 has 18 divisors (see below), whose sum is σ = 205386934158. Its totient is φ = 52675162848.

The previous prime is 111203123011. The next prime is 111203123023. The reversal of 111203123012 is 210321302111.

It can be written as a sum of positive squares in only one way, i.e., 111138223876 + 64899136 = 333374^2 + 8056^2 .

It is a super-2 number, since 2×111203123012² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111203123011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38503793 + ... + 38506680.

It is an arithmetic number, because the mean of its divisors is an integer number (11410385231).

Almost surely, 2^111203123012 is an apocalyptic number.

It is an amenable number.

111203123012 is a deficient number, since it is larger than the sum of its proper divisors (94183811146).

111203123012 is a wasteful number, since it uses less digits than its factorization.

111203123012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77010515 (or 77010494 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 111203123012 its reverse (210321302111), we get a palindrome (321524425123).

The spelling of 111203123012 in words is "one hundred eleven billion, two hundred three million, one hundred twenty-three thousand, twelve".