23550350220121 has 4 divisors (see below), whose sum is σ = 23553401977252. Its totient is φ = 23547298462992.

The previous prime is 23550350220077. The next prime is 23550350220197. The reversal of 23550350220121 is 12102205305532.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8538902179600 + 15011448040521 = 2922140^2 + 3874461^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23550350220121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23550350220721) 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, 1525866990 + ... + 1525882423.

It is an arithmetic number, because the mean of its divisors is an integer number (5888350494313).

Almost surely, 2^{23550350220121} is an apocalyptic number.

It is an amenable number.

23550350220121 is a deficient number, since it is larger than the sum of its proper divisors (3051757131).

23550350220121 is an equidigital number, since it uses as much as digits as its factorization.

23550350220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3051757130.

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 23550350220121 its reverse (12102205305532), we get a palindrome (35652555525653).

The spelling of 23550350220121 in words is "twenty-three trillion, five hundred fifty billion, three hundred fifty million, two hundred twenty thousand, one hundred twenty-one".