1111203123102 has 32 divisors (see below), whose sum is σ = 2469481205760. Its totient is φ = 370379901240.

The previous prime is 1111203123091. The next prime is 1111203123109. The reversal of 1111203123102 is 2013213021111.

1111203123102 is a `hidden beast` number, since 11 + 11 + 20 + 312 + 310 + 2 = 666.

It is a super-2 number, since 2×1111203123102² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111203123109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 382393 + ... + 1539035.

It is an arithmetic number, because the mean of its divisors is an integer number (77171287680).

Almost surely, 2^{1111203123102} is an apocalyptic number.

1111203123102 is an abundant number, since it is smaller than the sum of its proper divisors (1358278082658).

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

1111203123102 is a wasteful number, since it uses less digits than its factorization.

1111203123102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1174445 (or 1174439 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1111203123102 its reverse (2013213021111), we get a palindrome (3124416144213).

The spelling of 1111203123102 in words is "one trillion, one hundred eleven billion, two hundred three million, one hundred twenty-three thousand, one hundred two".