11222404051221 has 24 divisors (see below), whose sum is σ = 18115100115840. Its totient is φ = 6635567803200.

The previous prime is 11222404051213. The next prime is 11222404051259. The reversal of 11222404051221 is 12215040422211.

11222404051221 is a `hidden beast` number, since 1 + 1 + 2 + 2 + 240 + 405 + 12 + 2 + 1 = 666.

It is not a de Polignac number, because 11222404051221 - 2³ = 11222404051213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222404051211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1382405901 + ... + 1382414018.

It is an arithmetic number, because the mean of its divisors is an integer number (754795838160).

Almost surely, 2^{11222404051221} is an apocalyptic number.

11222404051221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11222404051221 is a deficient number, since it is larger than the sum of its proper divisors (6892696064619).

11222404051221 is a wasteful number, since it uses less digits than its factorization.

11222404051221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2764819977 (or 2764819974 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

Adding to 11222404051221 its reverse (12215040422211), we get a palindrome (23437444473432).

The spelling of 11222404051221 in words is "eleven trillion, two hundred twenty-two billion, four hundred four million, fifty-one thousand, two hundred twenty-one".