9920200123 has 2 divisors, whose sum is σ = 9920200124. Its totient is φ = 9920200122.

The previous prime is 9920200109. The next prime is 9920200151. The reversal of 9920200123 is 3210020299.

It is an a-pointer prime, because the next prime (9920200151) can be obtained adding 9920200123 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9920200123 - 2¹⁷ = 9920069051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9920200091 and 9920200100.

It is not a weakly prime, because it can be changed into another prime (9920200153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4960100061 + 4960100062.

It is an arithmetic number, because the mean of its divisors is an integer number (4960100062).

Almost surely, 2^9920200123 is an apocalyptic number.

9920200123 is a deficient number, since it is larger than the sum of its proper divisors (1).

9920200123 is an equidigital number, since it uses as much as digits as its factorization.

9920200123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 9920200123 is about 99600.2014204791. The cubic root of 9920200123 is about 2148.6885907758.

The spelling of 9920200123 in words is "nine billion, nine hundred twenty million, two hundred thousand, one hundred twenty-three".