121010321 has 2 divisors, whose sum is σ = 121010322. Its totient is φ = 121010320.

The previous prime is 121010303. The next prime is 121010327. The reversal of 121010321 is 123010121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120209296 + 801025 = 10964^2 + 895^2 .

It is a cyclic number.

It is not a de Polignac number, because 121010321 - 2⁶ = 121010257 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (121010327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60505160 + 60505161.

It is an arithmetic number, because the mean of its divisors is an integer number (60505161).

Almost surely, 2^121010321 is an apocalyptic number.

It is an amenable number.

121010321 is a deficient number, since it is larger than the sum of its proper divisors (1).

121010321 is an equidigital number, since it uses as much as digits as its factorization.

121010321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 121010321 is about 11000.4691263600. The cubic root of 121010321 is about 494.6228068916.

Adding to 121010321 its reverse (123010121), we get a palindrome (244020442).

The spelling of 121010321 in words is "one hundred twenty-one million, ten thousand, three hundred twenty-one".