2536118723221 has 2 divisors, whose sum is σ = 2536118723222. Its totient is φ = 2536118723220.

The previous prime is 2536118723209. The next prime is 2536118723233. The reversal of 2536118723221 is 1223278116352.

2536118723221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (2536118723209) and next prime (2536118723233).

It can be written as a sum of positive squares in only one way, i.e., 2529645716196 + 6473007025 = 1590486^2 + 80455^2 .

It is a cyclic number.

It is not a de Polignac number, because 2536118723221 - 2¹¹ = 2536118721173 is a prime.

It is a super-2 number, since 2×2536118723221² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2536118723261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1268059361610 + 1268059361611.

It is an arithmetic number, because the mean of its divisors is an integer number (1268059361611).

Almost surely, 2^{2536118723221} is an apocalyptic number.

It is an amenable number.

2536118723221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2536118723221 is an equidigital number, since it uses as much as digits as its factorization.

2536118723221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 43.

The spelling of 2536118723221 in words is "two trillion, five hundred thirty-six billion, one hundred eighteen million, seven hundred twenty-three thousand, two hundred twenty-one".