121212031201 has 4 divisors (see below), whose sum is σ = 121212848304. Its totient is φ = 121211214100.

The previous prime is 121212031183. The next prime is 121212031207. The reversal of 121212031201 is 102130212121.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 121212031201 - 2⁹ = 121212030689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121212031207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116395 + ... + 505936.

It is an arithmetic number, because the mean of its divisors is an integer number (30303212076).

Almost surely, 2^121212031201 is an apocalyptic number.

It is an amenable number.

121212031201 is a deficient number, since it is larger than the sum of its proper divisors (817103).

121212031201 is an equidigital number, since it uses as much as digits as its factorization.

121212031201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817102.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 121212031201 its reverse (102130212121), we get a palindrome (223342243322).

The spelling of 121212031201 in words is "one hundred twenty-one billion, two hundred twelve million, thirty-one thousand, two hundred one".