121201333021 has 8 divisors (see below), whose sum is σ = 121863564504. Its totient is φ = 120539576640.

The previous prime is 121201333007. The next prime is 121201333037. The reversal of 121201333021 is 120333102121.

It can be written as a sum of positive squares in 4 ways, for example, as 105647751225 + 15553581796 = 325035^2 + 124714^2 .

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 121201333021 - 2¹⁷ = 121201201949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121201333021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121201333081) 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 7 ways as a sum of consecutive naturals, for example, 398971 + ... + 633703.

It is an arithmetic number, because the mean of its divisors is an integer number (15232945563).

Almost surely, 2^121201333021 is an apocalyptic number.

It is an amenable number.

121201333021 is a deficient number, since it is larger than the sum of its proper divisors (662231483).

121201333021 is a wasteful number, since it uses less digits than its factorization.

121201333021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237551.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 121201333021 its reverse (120333102121), we get a palindrome (241534435142).

The spelling of 121201333021 in words is "one hundred twenty-one billion, two hundred one million, three hundred thirty-three thousand, twenty-one".