121123210313 has 4 divisors (see below), whose sum is σ = 138426526080. Its totient is φ = 103819894548.

The previous prime is 121123210301. The next prime is 121123210343. The reversal of 121123210313 is 313012321121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121123210313 - 2⁴ = 121123210297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121123210343) 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, 8651657873 + ... + 8651657886.

It is an arithmetic number, because the mean of its divisors is an integer number (34606631520).

Almost surely, 2^121123210313 is an apocalyptic number.

It is an amenable number.

121123210313 is a deficient number, since it is larger than the sum of its proper divisors (17303315767).

121123210313 is an equidigital number, since it uses as much as digits as its factorization.

121123210313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17303315766.

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

Adding to 121123210313 its reverse (313012321121), we get a palindrome (434135531434).

The spelling of 121123210313 in words is "one hundred twenty-one billion, one hundred twenty-three million, two hundred ten thousand, three hundred thirteen".