261122107 has 2 divisors, whose sum is σ = 261122108. Its totient is φ = 261122106.

The previous prime is 261122087. The next prime is 261122117. The reversal of 261122107 is 701221162.

It is a happy number.

261122107 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261122107 is a prime.

It is not a weakly prime, because it can be changed into another prime (261122117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130561053 + 130561054.

It is an arithmetic number, because the mean of its divisors is an integer number (130561054).

Almost surely, 2^261122107 is an apocalyptic number.

261122107 is a deficient number, since it is larger than the sum of its proper divisors (1).

261122107 is an equidigital number, since it uses as much as digits as its factorization.

261122107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 261122107 is about 16159.2730962751. The cubic root of 261122107 is about 639.1672983926.

Adding to 261122107 its reverse (701221162), we get a palindrome (962343269).

The spelling of 261122107 in words is "two hundred sixty-one million, one hundred twenty-two thousand, one hundred seven".