121111000011001 has 48 divisors (see below), whose sum is σ = 165522892106880. Its totient is φ = 87108302776320.

The previous prime is 121111000010993. The next prime is 121111000011013. The reversal of 121111000011001 is 100110000111121.

It is not a de Polignac number, because 121111000011001 - 2³ = 121111000010993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121111000017001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 138140460 + ... + 139014418.

It is an arithmetic number, because the mean of its divisors is an integer number (3448393585560).

Almost surely, 2^{121111000011001} is an apocalyptic number.

121111000011001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121111000011001 is a deficient number, since it is larger than the sum of its proper divisors (44411892095879).

121111000011001 is a wasteful number, since it uses less digits than its factorization.

121111000011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893774 (or 893767 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 121111000011001 its reverse (100110000111121), we get a palindrome (221221000122122).

The spelling of 121111000011001 in words is "one hundred twenty-one trillion, one hundred eleven billion, eleven thousand, one".