111021002121 has 8 divisors (see below), whose sum is σ = 149465168320. Its totient is φ = 73295418672.

The previous prime is 111021002101. The next prime is 111021002221. The reversal of 111021002121 is 121200120111.

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

It is not a de Polignac number, because 111021002121 - 2⁵ = 111021002089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111021002097 and 111021002106.

It is not an unprimeable number, because it can be changed into a prime (111021002101) 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, 179645326 + ... + 179645943.

It is an arithmetic number, because the mean of its divisors is an integer number (18683146040).

Almost surely, 2^111021002121 is an apocalyptic number.

It is an amenable number.

111021002121 is a deficient number, since it is larger than the sum of its proper divisors (38444166199).

111021002121 is a wasteful number, since it uses less digits than its factorization.

111021002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359291375.

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

Adding to 111021002121 its reverse (121200120111), we get a palindrome (232221122232).

The spelling of 111021002121 in words is "one hundred eleven billion, twenty-one million, two thousand, one hundred twenty-one".