121131203321 has 2 divisors, whose sum is σ = 121131203322. Its totient is φ = 121131203320.

The previous prime is 121131203273. The next prime is 121131203399. The reversal of 121131203321 is 123302131121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107675203321 + 13456000000 = 328139^2 + 116000^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121131203321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121131203293 and 121131203302.

It is not a weakly prime, because it can be changed into another prime (121131202321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60565601660 + 60565601661.

It is an arithmetic number, because the mean of its divisors is an integer number (60565601661).

Almost surely, 2^121131203321 is an apocalyptic number.

It is an amenable number.

121131203321 is a deficient number, since it is larger than the sum of its proper divisors (1).

121131203321 is an equidigital number, since it uses as much as digits as its factorization.

121131203321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 121131203321 its reverse (123302131121), we get a palindrome (244433334442).

The spelling of 121131203321 in words is "one hundred twenty-one billion, one hundred thirty-one million, two hundred three thousand, three hundred twenty-one".