13121122222001 has 4 divisors (see below), whose sum is σ = 13121214729252. Its totient is φ = 13121029714752.

The previous prime is 13121122221971. The next prime is 13121122222037. The reversal of 13121122222001 is 10022222112131.

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 6373726341376 + 6747395880625 = 2524624^2 + 2597575^2 .

It is a cyclic number.

It is not a de Polignac number, because 13121122222001 - 2²² = 13121118027697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13121122122001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46040540 + ... + 46324653.

It is an arithmetic number, because the mean of its divisors is an integer number (3280303682313).

Almost surely, 2^{13121122222001} is an apocalyptic number.

It is an amenable number.

13121122222001 is a deficient number, since it is larger than the sum of its proper divisors (92507251).

13121122222001 is an equidigital number, since it uses as much as digits as its factorization.

13121122222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92507250.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 13121122222001 its reverse (10022222112131), we get a palindrome (23143344334132).

The spelling of 13121122222001 in words is "thirteen trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred twenty-two thousand, one".