20130123102 has 16 divisors (see below), whose sum is σ = 40464615312. Its totient is φ = 6675979520.

The previous prime is 20130123067. The next prime is 20130123121. The reversal of 20130123102 is 20132103102.

It is a super-2 number, since 2×20130123102² (a number of 21 digits) contains 22 as substring.

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, 8514099 + ... + 8516462.

It is an arithmetic number, because the mean of its divisors is an integer number (2529038457).

Almost surely, 2^20130123102 is an apocalyptic number.

20130123102 is an abundant number, since it is smaller than the sum of its proper divisors (20334492210).

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

20130123102 is a wasteful number, since it uses less digits than its factorization.

20130123102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17030763.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20130123102 its reverse (20132103102), we get a palindrome (40262226204).

The spelling of 20130123102 in words is "twenty billion, one hundred thirty million, one hundred twenty-three thousand, one hundred two".