11020032221 has 4 divisors (see below), whose sum is σ = 12021853344. Its totient is φ = 10018211100.

The previous prime is 11020032203. The next prime is 11020032227. The reversal of 11020032221 is 12223002011.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-11020032221 is a prime.

It is a super-2 number, since 2×11020032221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11020032196 and 11020032205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11020032227) 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, 500910545 + ... + 500910566.

It is an arithmetic number, because the mean of its divisors is an integer number (3005463336).

Almost surely, 2^11020032221 is an apocalyptic number.

11020032221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11020032221 is a deficient number, since it is larger than the sum of its proper divisors (1001821123).

11020032221 is a wasteful number, since it uses less digits than its factorization.

11020032221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001821122.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 11020032221 its reverse (12223002011), we get a palindrome (23243034232).

The spelling of 11020032221 in words is "eleven billion, twenty million, thirty-two thousand, two hundred twenty-one".