10202020123 has 4 divisors (see below), whose sum is σ = 10202709240. Its totient is φ = 10201331008.

The previous prime is 10202020121. The next prime is 10202020163. The reversal of 10202020123 is 32102020201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32102020201 = 1291 ⋅24866011.

It is a cyclic number.

It is not a de Polignac number, because 10202020123 - 2¹ = 10202020121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10202020121) 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, 321853 + ... + 352126.

It is an arithmetic number, because the mean of its divisors is an integer number (2550677310).

Almost surely, 2^10202020123 is an apocalyptic number.

10202020123 is a deficient number, since it is larger than the sum of its proper divisors (689117).

10202020123 is an equidigital number, since it uses as much as digits as its factorization.

10202020123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689116.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 10202020123 its reverse (32102020201), we get a palindrome (42304040324).

The spelling of 10202020123 in words is "ten billion, two hundred two million, twenty thousand, one hundred twenty-three".