11221022405 has 4 divisors (see below), whose sum is σ = 13465226892. Its totient is φ = 8976817920.

The previous prime is 11221022383. The next prime is 11221022429. The reversal of 11221022405 is 50422012211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8537575201 + 2683447204 = 92399^2 + 51802^2 .

It is not a de Polignac number, because 11221022405 - 2⁶ = 11221022341 is a prime.

It is a super-2 number, since 2×11221022405² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1122102236 + ... + 1122102245.

It is an arithmetic number, because the mean of its divisors is an integer number (3366306723).

Almost surely, 2^11221022405 is an apocalyptic number.

It is an amenable number.

11221022405 is a deficient number, since it is larger than the sum of its proper divisors (2244204487).

11221022405 is an equidigital number, since it uses as much as digits as its factorization.

11221022405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2244204486.

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 11221022405 its reverse (50422012211), we get a palindrome (61643034616).

The spelling of 11221022405 in words is "eleven billion, two hundred twenty-one million, twenty-two thousand, four hundred five".