1212121122301 has 4 divisors (see below), whose sum is σ = 1213194747100. Its totient is φ = 1211047497504.

The previous prime is 1212121122239. The next prime is 1212121122319. The reversal of 1212121122301 is 1032211212121.

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 286963776100 + 925157346201 = 535690^2 + 961851^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212121122301 - 2²⁵ = 1212087567869 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 (1212121122101) 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, 536810706 + ... + 536812963.

It is an arithmetic number, because the mean of its divisors is an integer number (303298686775).

Almost surely, 2^{1212121122301} is an apocalyptic number.

It is an amenable number.

1212121122301 is a deficient number, since it is larger than the sum of its proper divisors (1073624799).

1212121122301 is a wasteful number, since it uses less digits than its factorization.

1212121122301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073624798.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1212121122301 its reverse (1032211212121), we get a palindrome (2244332334422).

The spelling of 1212121122301 in words is "one trillion, two hundred twelve billion, one hundred twenty-one million, one hundred twenty-two thousand, three hundred one".