11222020221 has 4 divisors (see below), whose sum is σ = 14962693632. Its totient is φ = 7481346812.

The previous prime is 11222020193. The next prime is 11222020223. The reversal of 11222020221 is 12202022211.

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 11222020221 - 2¹⁸ = 11221758077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11222020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222020223) 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, 1870336701 + ... + 1870336706.

It is an arithmetic number, because the mean of its divisors is an integer number (3740673408).

Almost surely, 2^11222020221 is an apocalyptic number.

It is an amenable number.

11222020221 is a deficient number, since it is larger than the sum of its proper divisors (3740673411).

11222020221 is an equidigital number, since it uses as much as digits as its factorization.

11222020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3740673410.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 11222020221 its reverse (12202022211), we get a palindrome (23424042432).

The spelling of 11222020221 in words is "eleven billion, two hundred twenty-two million, twenty thousand, two hundred twenty-one".