1236501244061 has 2 divisors, whose sum is σ = 1236501244062. Its totient is φ = 1236501244060.

The previous prime is 1236501244039. The next prime is 1236501244063. The reversal of 1236501244061 is 1604421056321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1134504047161 + 101997196900 = 1065131^2 + 319370^2 .

It is an emirp because it is prime and its reverse (1604421056321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1236501244061 - 2⁶ = 1236501243997 is a prime.

Together with 1236501244063, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1236501244063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 618250622030 + 618250622031.

It is an arithmetic number, because the mean of its divisors is an integer number (618250622031).

Almost surely, 2^{1236501244061} is an apocalyptic number.

It is an amenable number.

1236501244061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1236501244061 is an equidigital number, since it uses as much as digits as its factorization.

1236501244061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 1236501244061 in words is "one trillion, two hundred thirty-six billion, five hundred one million, two hundred forty-four thousand, sixty-one".