121333021 has 4 divisors (see below), whose sum is σ = 121373532. Its totient is φ = 121292512.

The previous prime is 121333001. The next prime is 121333033. The reversal of 121333021 is 120333121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120333121 = 157 ⋅766453.

It can be written as a sum of positive squares in 2 ways, for example, as 116337796 + 4995225 = 10786^2 + 2235^2 .

It is a cyclic number.

It is not a de Polignac number, because 121333021 - 2⁵ = 121332989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121332986 and 121333004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121333001) 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, 15370 + ... + 21883.

It is an arithmetic number, because the mean of its divisors is an integer number (30343383).

Almost surely, 2^121333021 is an apocalyptic number.

It is an amenable number.

121333021 is a deficient number, since it is larger than the sum of its proper divisors (40511).

121333021 is an equidigital number, since it uses as much as digits as its factorization.

121333021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40510.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 121333021 is about 11015.1269171081. The cubic root of 121333021 is about 495.0620892766.

Adding to 121333021 its reverse (120333121), we get a palindrome (241666142).

The spelling of 121333021 in words is "one hundred twenty-one million, three hundred thirty-three thousand, twenty-one".