121331521303 has 2 divisors, whose sum is σ = 121331521304. Its totient is φ = 121331521302.

The previous prime is 121331521249. The next prime is 121331521379. The reversal of 121331521303 is 303125133121.

It is a weak prime.

It is an emirp because it is prime and its reverse (303125133121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121331521303 - 2¹³ = 121331513111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121331521603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60665760651 + 60665760652.

It is an arithmetic number, because the mean of its divisors is an integer number (60665760652).

Almost surely, 2^121331521303 is an apocalyptic number.

121331521303 is a deficient number, since it is larger than the sum of its proper divisors (1).

121331521303 is an equidigital number, since it uses as much as digits as its factorization.

121331521303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 25.

Adding to 121331521303 its reverse (303125133121), we get a palindrome (424456654424).

The spelling of 121331521303 in words is "one hundred twenty-one billion, three hundred thirty-one million, five hundred twenty-one thousand, three hundred three".