121110111001021 has 4 divisors (see below), whose sum is σ = 121122807321600. Its totient is φ = 121097414680444.

The previous prime is 121110111000979. The next prime is 121110111001031. The reversal of 121110111001021 is 120100111011121.

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 a de Polignac number, because none of the positive numbers 2^k-121110111001021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121110111000992 and 121110111001010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121110111001031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6348145981 + ... + 6348165058.

It is an arithmetic number, because the mean of its divisors is an integer number (30280701830400).

Almost surely, 2^{121110111001021} is an apocalyptic number.

It is an amenable number.

121110111001021 is a deficient number, since it is larger than the sum of its proper divisors (12696320579).

121110111001021 is an equidigital number, since it uses as much as digits as its factorization.

121110111001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12696320578.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 121110111001021 its reverse (120100111011121), we get a palindrome (241210222012142).

The spelling of 121110111001021 in words is "one hundred twenty-one trillion, one hundred ten billion, one hundred eleven million, one thousand, twenty-one".