121020321021 has 8 divisors (see below), whose sum is σ = 170852217984. Its totient is φ = 75934319040.

The previous prime is 121020321017. The next prime is 121020321043. The reversal of 121020321021 is 120123020121.

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

It is not a de Polignac number, because 121020321021 - 2² = 121020321017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121020321011) 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 7 ways as a sum of consecutive naturals, for example, 1186473685 + ... + 1186473786.

It is an arithmetic number, because the mean of its divisors is an integer number (21356527248).

Almost surely, 2^121020321021 is an apocalyptic number.

It is an amenable number.

121020321021 is a deficient number, since it is larger than the sum of its proper divisors (49831896963).

121020321021 is a wasteful number, since it uses less digits than its factorization.

121020321021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2372947491.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 121020321021 its reverse (120123020121), we get a palindrome (241143341142).

The spelling of 121020321021 in words is "one hundred twenty-one billion, twenty million, three hundred twenty-one thousand, twenty-one".