12550770521 has 2 divisors, whose sum is σ = 12550770522. Its totient is φ = 12550770520.

The previous prime is 12550770503. The next prime is 12550770541. The reversal of 12550770521 is 12507705521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12325440400 + 225330121 = 111020^2 + 15011^2 .

It is a cyclic number.

It is not a de Polignac number, because 12550770521 - 2¹⁴ = 12550754137 is a prime.

It is a super-2 number, since 2×12550770521² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12550770541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6275385260 + 6275385261.

It is an arithmetic number, because the mean of its divisors is an integer number (6275385261).

Almost surely, 2^12550770521 is an apocalyptic number.

It is an amenable number.

12550770521 is a deficient number, since it is larger than the sum of its proper divisors (1).

12550770521 is an equidigital number, since it uses as much as digits as its factorization.

12550770521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24500, while the sum is 35.

The spelling of 12550770521 in words is "twelve billion, five hundred fifty million, seven hundred seventy thousand, five hundred twenty-one".