121231033313 has 4 divisors (see below), whose sum is σ = 130556497428. Its totient is φ = 111905569200.

The previous prime is 121231033309. The next prime is 121231033321. The reversal of 121231033313 is 313330132121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46383375424 + 74847657889 = 215368^2 + 273583^2 .

It is a cyclic number.

It is not a de Polignac number, because 121231033313 - 2² = 121231033309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121231033333) 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, 4662732038 + ... + 4662732063.

It is an arithmetic number, because the mean of its divisors is an integer number (32639124357).

Almost surely, 2^121231033313 is an apocalyptic number.

121231033313 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

121231033313 is a deficient number, since it is larger than the sum of its proper divisors (9325464115).

121231033313 is an equidigital number, since it uses as much as digits as its factorization.

121231033313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9325464114.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 121231033313 its reverse (313330132121), we get a palindrome (434561165434).

The spelling of 121231033313 in words is "one hundred twenty-one billion, two hundred thirty-one million, thirty-three thousand, three hundred thirteen".