121121110003021 has 4 divisors (see below), whose sum is σ = 122320328914044. Its totient is φ = 119921891092000.

The previous prime is 121121110002989. The next prime is 121121110003027. The reversal of 121121110003021 is 120300011121121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 117570410454121 + 3550699548900 = 10842989^2 + 1884330^2 .

It is a cyclic number.

It is not a de Polignac number, because 121121110003021 - 2⁵ = 121121110002989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121121110002986 and 121121110003004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121110003027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 599609455360 + ... + 599609455561.

It is an arithmetic number, because the mean of its divisors is an integer number (30580082228511).

Almost surely, 2^{121121110003021} is an apocalyptic number.

It is an amenable number.

121121110003021 is a deficient number, since it is larger than the sum of its proper divisors (1199218911023).

121121110003021 is a wasteful number, since it uses less digits than its factorization.

121121110003021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199218911022.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 121121110003021 its reverse (120300011121121), we get a palindrome (241421121124142).

The spelling of 121121110003021 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, one hundred ten million, three thousand, twenty-one".