11111222002021 has 8 divisors (see below), whose sum is σ = 11300314508384. Its totient is φ = 10922353409520.

The previous prime is 11111222001977. The next prime is 11111222002073. The reversal of 11111222002021 is 12020022211111.

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-11111222002021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11111222001986 and 11111222002004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111222002721) 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, 55878375 + ... + 56076868.

It is an arithmetic number, because the mean of its divisors is an integer number (1412539313548).

Almost surely, 2^{11111222002021} is an apocalyptic number.

It is an amenable number.

11111222002021 is a deficient number, since it is larger than the sum of its proper divisors (189092506363).

11111222002021 is a wasteful number, since it uses less digits than its factorization.

11111222002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111956931.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11111222002021 its reverse (12020022211111), we get a palindrome (23131244213132).

The spelling of 11111222002021 in words is "eleven trillion, one hundred eleven billion, two hundred twenty-two million, two thousand, twenty-one".