20030102123 has 4 divisors (see below), whose sum is σ = 20031149688. Its totient is φ = 20029054560.

The previous prime is 20030102111. The next prime is 20030102149. The reversal of 20030102123 is 32120103002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20030102123 - 2¹⁰ = 20030101099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20030102098 and 20030102107.

It is not an unprimeable number, because it can be changed into a prime (20030102723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 494558 + ... + 533523.

It is an arithmetic number, because the mean of its divisors is an integer number (5007787422).

Almost surely, 2^20030102123 is an apocalyptic number.

20030102123 is a deficient number, since it is larger than the sum of its proper divisors (1047565).

20030102123 is a wasteful number, since it uses less digits than its factorization.

20030102123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047564.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 20030102123 its reverse (32120103002), we get a palindrome (52150205125).

The spelling of 20030102123 in words is "twenty billion, thirty million, one hundred two thousand, one hundred twenty-three".