11220010021 has 16 divisors (see below), whose sum is σ = 12584952576. Its totient is φ = 9914400000.

The previous prime is 11220010019. The next prime is 11220010027. The reversal of 11220010021 is 12001002211.

It is a cyclic number.

It is not a de Polignac number, because 11220010021 - 2¹ = 11220010019 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 (11220010027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76321 + ... + 168121.

It is an arithmetic number, because the mean of its divisors is an integer number (786559536).

Almost surely, 2^11220010021 is an apocalyptic number.

11220010021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11220010021 is a deficient number, since it is larger than the sum of its proper divisors (1364942555).

11220010021 is a wasteful number, since it uses less digits than its factorization.

11220010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92124.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 11220010021 its reverse (12001002211), we get a palindrome (23221012232).

It can be divided in two parts, 112200 and 10021, that added together give a palindrome (122221).

The spelling of 11220010021 in words is "eleven billion, two hundred twenty million, ten thousand, twenty-one".