121311000121 has 8 divisors (see below), whose sum is σ = 124274378088. Its totient is φ = 118347840000.

The previous prime is 121311000113. The next prime is 121311000169. The reversal of 121311000121 is 121000113121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10980734521 + 110330265600 = 104789^2 + 332160^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121311000121 - 2³ = 121311000113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121311000191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2111901 + ... + 2168581.

It is an arithmetic number, because the mean of its divisors is an integer number (15534297261).

Almost surely, 2^121311000121 is an apocalyptic number.

It is an amenable number.

121311000121 is a deficient number, since it is larger than the sum of its proper divisors (2963377967).

121311000121 is an equidigital number, since it uses as much as digits as its factorization.

121311000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108923.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 121311000121 its reverse (121000113121), we get a palindrome (242311113242).

The spelling of 121311000121 in words is "one hundred twenty-one billion, three hundred eleven million, one hundred twenty-one", and thus it is an aban number.