11156077133221 has 2 divisors, whose sum is σ = 11156077133222. Its totient is φ = 11156077133220.

The previous prime is 11156077133209. The next prime is 11156077133251. The reversal of 11156077133221 is 12233177065111.

It is a happy number.

11156077133221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10291353824196 + 864723309025 = 3208014^2 + 929905^2 .

It is a cyclic number.

It is not a de Polignac number, because 11156077133221 - 2¹⁷ = 11156077002149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11156077133251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5578038566610 + 5578038566611.

It is an arithmetic number, because the mean of its divisors is an integer number (5578038566611).

Almost surely, 2^{11156077133221} is an apocalyptic number.

It is an amenable number.

11156077133221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11156077133221 is an equidigital number, since it uses as much as digits as its factorization.

11156077133221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 40.

The spelling of 11156077133221 in words is "eleven trillion, one hundred fifty-six billion, seventy-seven million, one hundred thirty-three thousand, two hundred twenty-one".