121212212212021 has 8 divisors (see below), whose sum is σ = 138535595948160. Its totient is φ = 103890666830928.

The previous prime is 121212212211949. The next prime is 121212212212027. The reversal of 121212212212021 is 120212212212121.

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 121212212212021 - 2⁹ = 121212212211509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121212212211983 and 121212212212001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212212212027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 459447466 + ... + 459711211.

It is an arithmetic number, because the mean of its divisors is an integer number (17316949493520).

Almost surely, 2^{121212212212021} is an apocalyptic number.

It is an amenable number.

121212212212021 is a deficient number, since it is larger than the sum of its proper divisors (17323383736139).

121212212212021 is an equidigital number, since it uses as much as digits as its factorization.

121212212212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919177523.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 121212212212021 its reverse (120212212212121), we get a palindrome (241424424424142).

The spelling of 121212212212021 in words is "one hundred twenty-one trillion, two hundred twelve billion, two hundred twelve million, two hundred twelve thousand, twenty-one".