20203020112123 has 4 divisors (see below), whose sum is σ = 20545444181880. Its totient is φ = 19860596042368.

The previous prime is 20203020112103. The next prime is 20203020112151. The reversal of 20203020112123 is 32121102030202.

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 20203020112123 - 2¹⁷ = 20203019981051 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20203020112123.

It is not an unprimeable number, because it can be changed into a prime (20203020112103) 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, 171212034790 + ... + 171212034907.

It is an arithmetic number, because the mean of its divisors is an integer number (5136361045470).

Almost surely, 2^{20203020112123} is an apocalyptic number.

20203020112123 is a deficient number, since it is larger than the sum of its proper divisors (342424069757).

20203020112123 is an equidigital number, since it uses as much as digits as its factorization.

20203020112123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342424069756.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20203020112123 its reverse (32121102030202), we get a palindrome (52324122142325).

The spelling of 20203020112123 in words is "twenty trillion, two hundred three billion, twenty million, one hundred twelve thousand, one hundred twenty-three".