11111222010021 has 8 divisors (see below), whose sum is σ = 16931385920064. Its totient is φ = 6349269720000.

The previous prime is 11111222009969. The next prime is 11111222010061. The reversal of 11111222010021 is 12001022211111.

It is a happy number.

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

It is not a de Polignac number, because 11111222010021 - 2¹⁵ = 11111221977253 is a prime.

It is a super-2 number, since 2×11111222010021² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111222010061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264552904980 + ... + 264552905021.

It is an arithmetic number, because the mean of its divisors is an integer number (2116423240008).

Almost surely, 2^{11111222010021} is an apocalyptic number.

It is an amenable number.

11111222010021 is a deficient number, since it is larger than the sum of its proper divisors (5820163910043).

11111222010021 is an equidigital number, since it uses as much as digits as its factorization.

11111222010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529105810011.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11111222010021 its reverse (12001022211111), we get a palindrome (23112244221132).

The spelling of 11111222010021 in words is "eleven trillion, one hundred eleven billion, two hundred twenty-two million, ten thousand, twenty-one".