202172123 has 2 divisors, whose sum is σ = 202172124. Its totient is φ = 202172122.

The previous prime is 202172101. The next prime is 202172129. The reversal of 202172123 is 321271202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 202172123 - 2⁸ = 202171867 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202172095 and 202172104.

It is not a weakly prime, because it can be changed into another prime (202172129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101086061 + 101086062.

It is an arithmetic number, because the mean of its divisors is an integer number (101086062).

Almost surely, 2^202172123 is an apocalyptic number.

202172123 is a deficient number, since it is larger than the sum of its proper divisors (1).

202172123 is an equidigital number, since it uses as much as digits as its factorization.

202172123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 202172123 is about 14218.7243801967. The cubic root of 202172123 is about 586.9130379143.

The spelling of 202172123 in words is "two hundred two million, one hundred seventy-two thousand, one hundred twenty-three".