11123123102 has 32 divisors (see below), whose sum is σ = 20560284864. Its totient is φ = 4394937600.

The previous prime is 11123123093. The next prime is 11123123107. The reversal of 11123123102 is 20132132111.

It is a super-2 number, since 2×11123123102² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11123123107) 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, 112202 + ... + 186642.

It is an arithmetic number, because the mean of its divisors is an integer number (642508902).

Almost surely, 2^11123123102 is an apocalyptic number.

11123123102 is a deficient number, since it is larger than the sum of its proper divisors (9437161762).

11123123102 is a wasteful number, since it uses less digits than its factorization.

11123123102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75284.

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

Adding to 11123123102 its reverse (20132132111), we get a palindrome (31255255213).

Subtracting 11123123102 from its reverse (20132132111), we obtain a palindrome (9009009009).

The spelling of 11123123102 in words is "eleven billion, one hundred twenty-three million, one hundred twenty-three thousand, one hundred two".