121100020003021 has 8 divisors (see below), whose sum is σ = 128223670240440. Its totient is φ = 113976383059968.

The previous prime is 121100020003009. The next prime is 121100020003033. The reversal of 121100020003021 is 120300020001121.

It is an interprime number because it is at equal distance from previous prime (121100020003009) and next prime (121100020003033).

It can be written as a sum of positive squares in 4 ways, for example, as 3973189077796 + 117126830925225 = 1993286^2 + 10822515^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121100020003021 - 2⁵ = 121100020002989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121100020002992 and 121100020003010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121100020003051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20179075 + ... + 25483231.

It is an arithmetic number, because the mean of its divisors is an integer number (16027958780055).

Almost surely, 2^{121100020003021} is an apocalyptic number.

It is an amenable number.

121100020003021 is a deficient number, since it is larger than the sum of its proper divisors (7123650237419).

121100020003021 is a wasteful number, since it uses less digits than its factorization.

121100020003021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6647183.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 121100020003021 its reverse (120300020001121), we get a palindrome (241400040004142).

The spelling of 121100020003021 in words is "one hundred twenty-one trillion, one hundred billion, twenty million, three thousand, twenty-one".