11221356406065 has 64 divisors (see below), whose sum is σ = 19482585964800. Its totient is φ = 5482417167360.

The previous prime is 11221356405989. The next prime is 11221356406069. The reversal of 11221356406065 is 56060465312211.

11221356406065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11221356406065 - 2¹⁰ = 11221356405041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11221356406069) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13968879 + ... + 14750331.

It is an arithmetic number, because the mean of its divisors is an integer number (304415405700).

Almost surely, 2^{11221356406065} is an apocalyptic number.

11221356406065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11221356406065 is a deficient number, since it is larger than the sum of its proper divisors (8261229558735).

11221356406065 is a wasteful number, since it uses less digits than its factorization.

11221356406065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782034.

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 11221356406065 in words is "eleven trillion, two hundred twenty-one billion, three hundred fifty-six million, four hundred six thousand, sixty-five".