121311101323 has 4 divisors (see below), whose sum is σ = 125224362688. Its totient is φ = 117397839960.

The previous prime is 121311101231. The next prime is 121311101341. The reversal of 121311101323 is 323101113121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 323101113121 = 151 ⋅2139742471.

It is a cyclic number.

It is not a de Polignac number, because 121311101323 - 2¹³ = 121311093131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121311101323.

It is not an unprimeable number, because it can be changed into a prime (121311101623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1956630636 + ... + 1956630697.

It is an arithmetic number, because the mean of its divisors is an integer number (31306090672).

Almost surely, 2^121311101323 is an apocalyptic number.

121311101323 is a deficient number, since it is larger than the sum of its proper divisors (3913261365).

121311101323 is an equidigital number, since it uses as much as digits as its factorization.

121311101323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3913261364.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 121311101323 its reverse (323101113121), we get a palindrome (444412214444).

The spelling of 121311101323 in words is "one hundred twenty-one billion, three hundred eleven million, one hundred one thousand, three hundred twenty-three".