101232778709 has 2 divisors, whose sum is σ = 101232778710. Its totient is φ = 101232778708.

The previous prime is 101232778651. The next prime is 101232778721. The reversal of 101232778709 is 907877232101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100919311684 + 313467025 = 317678^2 + 17705^2 .

It is a cyclic number.

It is not a de Polignac number, because 101232778709 - 2⁸ = 101232778453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101232738709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50616389354 + 50616389355.

It is an arithmetic number, because the mean of its divisors is an integer number (50616389355).

Almost surely, 2^101232778709 is an apocalyptic number.

It is an amenable number.

101232778709 is a deficient number, since it is larger than the sum of its proper divisors (1).

101232778709 is an equidigital number, since it uses as much as digits as its factorization.

101232778709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 296352, while the sum is 47.

The spelling of 101232778709 in words is "one hundred one billion, two hundred thirty-two million, seven hundred seventy-eight thousand, seven hundred nine".