11112021021 has 8 divisors (see below), whose sum is σ = 15293964544. Its totient is φ = 7169045760.

The previous prime is 11112021017. The next prime is 11112021029. The reversal of 11112021021 is 12012021111.

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

It is not a de Polignac number, because 11112021021 - 2² = 11112021017 is a prime.

It is a super-2 number, since 2×11112021021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11112020988 and 11112021006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112021029) 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, 59741956 + ... + 59742141.

It is an arithmetic number, because the mean of its divisors is an integer number (1911745568).

Almost surely, 2^11112021021 is an apocalyptic number.

It is an amenable number.

11112021021 is a deficient number, since it is larger than the sum of its proper divisors (4181943523).

11112021021 is a wasteful number, since it uses less digits than its factorization.

11112021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119484131.

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

Adding to 11112021021 its reverse (12012021111), we get a palindrome (23124042132).

The spelling of 11112021021 in words is "eleven billion, one hundred twelve million, twenty-one thousand, twenty-one".