111002012121 has 48 divisors (see below), whose sum is σ = 200222379392. Its totient is φ = 53227722240.

The previous prime is 111002012117. The next prime is 111002012207. The reversal of 111002012121 is 121210200111.

It is not a de Polignac number, because 111002012121 - 2² = 111002012117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111002012097 and 111002012106.

It is not an unprimeable number, because it can be changed into a prime (111002012101) 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 47 ways as a sum of consecutive naturals, for example, 1647136 + ... + 1713201.

Almost surely, 2^111002012121 is an apocalyptic number.

111002012121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111002012121 is a deficient number, since it is larger than the sum of its proper divisors (89220367271).

111002012121 is a wasteful number, since it uses less digits than its factorization.

111002012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3360382 (or 3360371 counting only the distinct ones).

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

Adding to 111002012121 its reverse (121210200111), we get a palindrome (232212212232).

The spelling of 111002012121 in words is "one hundred eleven billion, two million, twelve thousand, one hundred twenty-one".