121220122231313 has 24 divisors (see below), whose sum is σ = 149902434558720. Its totient is φ = 97459787023200.

The previous prime is 121220122231303. The next prime is 121220122231337. The reversal of 121220122231313 is 313132221022121.

It is not a de Polignac number, because 121220122231313 - 2²² = 121220118037009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121220122231303) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 644481281 + ... + 644669342.

It is an arithmetic number, because the mean of its divisors is an integer number (6245934773280).

Almost surely, 2^{121220122231313} is an apocalyptic number.

It is an amenable number.

121220122231313 is a deficient number, since it is larger than the sum of its proper divisors (28682312327407).

121220122231313 is a wasteful number, since it uses less digits than its factorization.

121220122231313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289150757 (or 1289150750 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 121220122231313 its reverse (313132221022121), we get a palindrome (434352343253434).

The spelling of 121220122231313 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred twenty-two million, two hundred thirty-one thousand, three hundred thirteen".