121003111213 has 4 divisors (see below), whose sum is σ = 121235363388. Its totient is φ = 120770859040.

The previous prime is 121003111189. The next prime is 121003111247. The reversal of 121003111213 is 312111300121.

It is a happy number.

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 72114805764 + 48888305449 = 268542^2 + 221107^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121003111213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121003111253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116125306 + ... + 116126347.

It is an arithmetic number, because the mean of its divisors is an integer number (30308840847).

Almost surely, 2^121003111213 is an apocalyptic number.

It is an amenable number.

121003111213 is a deficient number, since it is larger than the sum of its proper divisors (232252175).

121003111213 is an equidigital number, since it uses as much as digits as its factorization.

121003111213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232252174.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 121003111213 its reverse (312111300121), we get a palindrome (433114411334).

The spelling of 121003111213 in words is "one hundred twenty-one billion, three million, one hundred eleven thousand, two hundred thirteen".