11121265235221 has 2 divisors, whose sum is σ = 11121265235222. Its totient is φ = 11121265235220.

The previous prime is 11121265235183. The next prime is 11121265235243. The reversal of 11121265235221 is 12253256212111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11105056380625 + 16208854596 = 3332425^2 + 127314^2 .

It is a cyclic number.

It is not a de Polignac number, because 11121265235221 - 2²³ = 11121256846613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11121265235251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560632617610 + 5560632617611.

It is an arithmetic number, because the mean of its divisors is an integer number (5560632617611).

Almost surely, 2^{11121265235221} is an apocalyptic number.

It is an amenable number.

11121265235221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121265235221 is an equidigital number, since it uses as much as digits as its factorization.

11121265235221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 34.

The spelling of 11121265235221 in words is "eleven trillion, one hundred twenty-one billion, two hundred sixty-five million, two hundred thirty-five thousand, two hundred twenty-one".