20300123121 has 4 divisors (see below), whose sum is σ = 27066830832. Its totient is φ = 13533415412.

The previous prime is 20300123101. The next prime is 20300123159. The reversal of 20300123121 is 12132100302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20300123121 - 2⁷ = 20300122993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20300123121.

It is not an unprimeable number, because it can be changed into a prime (20300123101) 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, 3383353851 + ... + 3383353856.

It is an arithmetic number, because the mean of its divisors is an integer number (6766707708).

Almost surely, 2^20300123121 is an apocalyptic number.

It is an amenable number.

20300123121 is a deficient number, since it is larger than the sum of its proper divisors (6766707711).

20300123121 is an equidigital number, since it uses as much as digits as its factorization.

20300123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6766707710.

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

Adding to 20300123121 its reverse (12132100302), we get a palindrome (32432223423).

The spelling of 20300123121 in words is "twenty billion, three hundred million, one hundred twenty-three thousand, one hundred twenty-one".