111001002122121 has 4 divisors (see below), whose sum is σ = 148001336162832. Its totient is φ = 74000668081412.

The previous prime is 111001002122117. The next prime is 111001002122123. The reversal of 111001002122121 is 121221200100111.

It is a happy number.

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 111001002122121 - 2² = 111001002122117 is a prime.

It is a super-2 number, since 2×111001002122121² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111001002122121.

It is not an unprimeable number, because it can be changed into a prime (111001002122123) 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, 18500167020351 + ... + 18500167020356.

It is an arithmetic number, because the mean of its divisors is an integer number (37000334040708).

Almost surely, 2^{111001002122121} is an apocalyptic number.

It is an amenable number.

111001002122121 is a deficient number, since it is larger than the sum of its proper divisors (37000334040711).

111001002122121 is an equidigital number, since it uses as much as digits as its factorization.

111001002122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37000334040710.

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

Adding to 111001002122121 its reverse (121221200100111), we get a palindrome (232222202222232).

The spelling of 111001002122121 in words is "one hundred eleven trillion, one billion, two million, one hundred twenty-two thousand, one hundred twenty-one".