200121123120023 has 16 divisors (see below), whose sum is σ = 229719080338944. Its totient is φ = 170775483377760.

The previous prime is 200121123119999. The next prime is 200121123120053. The reversal of 200121123120023 is 320021321121002.

It is a cyclic number.

It is not a de Polignac number, because 200121123120023 - 2²⁸ = 200120854684567 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 200121123119977 and 200121123120004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200121123120053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261862238 + ... + 262625348.

It is an arithmetic number, because the mean of its divisors is an integer number (14357442521184).

Almost surely, 2^{200121123120023} is an apocalyptic number.

200121123120023 is a deficient number, since it is larger than the sum of its proper divisors (29597957218921).

200121123120023 is a wasteful number, since it uses less digits than its factorization.

200121123120023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928382.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 200121123120023 its reverse (320021321121002), we get a palindrome (520142444241025).

The spelling of 200121123120023 in words is "two hundred trillion, one hundred twenty-one billion, one hundred twenty-three million, one hundred twenty thousand, twenty-three".