11020101221 has 8 divisors (see below), whose sum is σ = 11064303744. Its totient is φ = 10975936320.

The previous prime is 11020101187. The next prime is 11020101223. The reversal of 11020101221 is 12210102011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11020101221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11020101223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 675956 + ... + 692066.

It is an arithmetic number, because the mean of its divisors is an integer number (1383037968).

Almost surely, 2^11020101221 is an apocalyptic number.

It is an amenable number.

11020101221 is a deficient number, since it is larger than the sum of its proper divisors (44202523).

11020101221 is a wasteful number, since it uses less digits than its factorization.

11020101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18811.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 11020101221 its reverse (12210102011), we get a palindrome (23230203232).

The spelling of 11020101221 in words is "eleven billion, twenty million, one hundred one thousand, two hundred twenty-one".