1111001210121 has 32 divisors (see below), whose sum is σ = 1666800989568. Its totient is φ = 652323939840.

The previous prime is 1111001210117. The next prime is 1111001210191. The reversal of 1111001210121 is 1210121001111.

It is not a de Polignac number, because 1111001210121 - 2² = 1111001210117 is a prime.

1111001210121 is a modest number, since divided by 1210121 gives 11110 as remainder.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1111001210097 and 1111001210106.

It is not an unprimeable number, because it can be changed into a prime (1111001210191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1668106 + ... + 2237091.

It is an arithmetic number, because the mean of its divisors is an integer number (52087530924).

Almost surely, 2^{1111001210121} is an apocalyptic number.

1111001210121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1111001210121 is a deficient number, since it is larger than the sum of its proper divisors (555799779447).

1111001210121 is a wasteful number, since it uses less digits than its factorization.

1111001210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3905481.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 1111001210121 its reverse (1210121001111), we get a palindrome (2321122211232).

The spelling of 1111001210121 in words is "one trillion, one hundred eleven billion, one million, two hundred ten thousand, one hundred twenty-one".