11020012221 has 32 divisors (see below), whose sum is σ = 15651163008. Its totient is φ = 6873108480.

The previous prime is 11020012207. The next prime is 11020012229. The reversal of 11020012221 is 12221002011.

It is not a de Polignac number, because 11020012221 - 2¹³ = 11020004029 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11020012197 and 11020012206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11020012229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7234966 + ... + 7236488.

It is an arithmetic number, because the mean of its divisors is an integer number (489098844).

Almost surely, 2^11020012221 is an apocalyptic number.

It is an amenable number.

11020012221 is a deficient number, since it is larger than the sum of its proper divisors (4631150787).

11020012221 is a wasteful number, since it uses less digits than its factorization.

11020012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2301.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 11020012221 its reverse (12221002011), we get a palindrome (23241014232).

The spelling of 11020012221 in words is "eleven billion, twenty million, twelve thousand, two hundred twenty-one".