20300021132123 has 4 divisors (see below), whose sum is σ = 20330184611448. Its totient is φ = 20269857652800.

The previous prime is 20300021132087. The next prime is 20300021132141. The reversal of 20300021132123 is 32123112000302.

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 20300021132123 - 2⁶ = 20300021132059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20300021132095 and 20300021132104.

It is not an unprimeable number, because it can be changed into a prime (20300021131123) 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, 15081738653 + ... + 15081739998.

It is an arithmetic number, because the mean of its divisors is an integer number (5082546152862).

Almost surely, 2^{20300021132123} is an apocalyptic number.

20300021132123 is a deficient number, since it is larger than the sum of its proper divisors (30163479325).

20300021132123 is an equidigital number, since it uses as much as digits as its factorization.

20300021132123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30163479324.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20300021132123 its reverse (32123112000302), we get a palindrome (52423133132425).

The spelling of 20300021132123 in words is "twenty trillion, three hundred billion, twenty-one million, one hundred thirty-two thousand, one hundred twenty-three".