11111202021 has 8 divisors (see below), whose sum is σ = 15159469600. Its totient is φ = 7235201232.

The previous prime is 11111201999. The next prime is 11111202041. The reversal of 11111202021 is 12020211111.

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

It is not a de Polignac number, because 11111202021 - 2¹⁴ = 11111185637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11111201988 and 11111202006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111202041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43066546 + ... + 43066803.

It is an arithmetic number, because the mean of its divisors is an integer number (1894933700).

Almost surely, 2^11111202021 is an apocalyptic number.

It is an amenable number.

11111202021 is a deficient number, since it is larger than the sum of its proper divisors (4048267579).

11111202021 is an equidigital number, since it uses as much as digits as its factorization.

11111202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86133395.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11111202021 its reverse (12020211111), we get a palindrome (23131413132).

It can be divided in two parts, 1111 and 1202021, that multiplied together give a palindrome (1335445331).

The spelling of 11111202021 in words is "eleven billion, one hundred eleven million, two hundred two thousand, twenty-one".