111111112002021 has 4 divisors (see below), whose sum is σ = 148148149336032. Its totient is φ = 74074074668012.

The previous prime is 111111112001999. The next prime is 111111112002029. The reversal of 111111112002021 is 120200211111111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111111112002021 - 2¹¹ = 111111111999973 is a prime.

It is a super-2 number, since 2×111111112002021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111112002029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18518518667001 + ... + 18518518667006.

It is an arithmetic number, because the mean of its divisors is an integer number (37037037334008).

Almost surely, 2^{111111112002021} is an apocalyptic number.

It is an amenable number.

111111112002021 is a deficient number, since it is larger than the sum of its proper divisors (37037037334011).

111111112002021 is an equidigital number, since it uses as much as digits as its factorization.

111111112002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37037037334010.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 111111112002021 its reverse (120200211111111), we get a palindrome (231311323113132).

The spelling of 111111112002021 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred twelve million, two thousand, twenty-one".