202101202123 has 2 divisors, whose sum is σ = 202101202124. Its totient is φ = 202101202122.

The previous prime is 202101202081. The next prime is 202101202129. The reversal of 202101202123 is 321202101202.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202101202123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202101202097 and 202101202106.

It is not a weakly prime, because it can be changed into another prime (202101202129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101050601061 + 101050601062.

It is an arithmetic number, because the mean of its divisors is an integer number (101050601062).

Almost surely, 2^202101202123 is an apocalyptic number.

202101202123 is a deficient number, since it is larger than the sum of its proper divisors (1).

202101202123 is an equidigital number, since it uses as much as digits as its factorization.

202101202123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 202101202123 its reverse (321202101202), we get a palindrome (523303303325).

The spelling of 202101202123 in words is "two hundred two billion, one hundred one million, two hundred two thousand, one hundred twenty-three".