202102838261 has 2 divisors, whose sum is σ = 202102838262. Its totient is φ = 202102838260.

The previous prime is 202102838257. The next prime is 202102838269. The reversal of 202102838261 is 162838201202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126810771025 + 75292067236 = 356105^2 + 274394^2 .

It is a cyclic number.

It is not a de Polignac number, because 202102838261 - 2² = 202102838257 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202102838269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101051419130 + 101051419131.

It is an arithmetic number, because the mean of its divisors is an integer number (101051419131).

Almost surely, 2^202102838261 is an apocalyptic number.

It is an amenable number.

202102838261 is a deficient number, since it is larger than the sum of its proper divisors (1).

202102838261 is an equidigital number, since it uses as much as digits as its factorization.

202102838261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 35.

The spelling of 202102838261 in words is "two hundred two billion, one hundred two million, eight hundred thirty-eight thousand, two hundred sixty-one".