11122001012221 has 4 divisors (see below), whose sum is σ = 12133092013344. Its totient is φ = 10110910011100.

The previous prime is 11122001012209. The next prime is 11122001012257. The reversal of 11122001012221 is 12221010022111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11122001012221 - 2³¹ = 11119853528573 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11122001012195 and 11122001012204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11122001012321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505545500545 + ... + 505545500566.

It is an arithmetic number, because the mean of its divisors is an integer number (3033273003336).

Almost surely, 2^{11122001012221} is an apocalyptic number.

11122001012221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11122001012221 is a deficient number, since it is larger than the sum of its proper divisors (1011091001123).

11122001012221 is a wasteful number, since it uses less digits than its factorization.

11122001012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011091001122.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11122001012221 its reverse (12221010022111), we get a palindrome (23343011034332).

The spelling of 11122001012221 in words is "eleven trillion, one hundred twenty-two billion, one million, twelve thousand, two hundred twenty-one".