121313021 has 2 divisors, whose sum is σ = 121313022. Its totient is φ = 121313020.

The previous prime is 121313011. The next prime is 121313029. The reversal of 121313021 is 120313121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95160025 + 26152996 = 9755^2 + 5114^2 .

It is a cyclic number.

It is not a de Polignac number, because 121313021 - 2¹⁰ = 121311997 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 121312987 and 121313005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121313029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60656510 + 60656511.

It is an arithmetic number, because the mean of its divisors is an integer number (60656511).

Almost surely, 2^121313021 is an apocalyptic number.

It is an amenable number.

121313021 is a deficient number, since it is larger than the sum of its proper divisors (1).

121313021 is an equidigital number, since it uses as much as digits as its factorization.

121313021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 121313021 is about 11014.2190372264. The cubic root of 121313021 is about 495.0348864981.

Adding to 121313021 its reverse (120313121), we get a palindrome (241626142).

The spelling of 121313021 in words is "one hundred twenty-one million, three hundred thirteen thousand, twenty-one".