3121042213121 has 8 divisors (see below), whose sum is σ = 3721988229504. Its totient is φ = 2558866907520.

The previous prime is 3121042213109. The next prime is 3121042213127. The reversal of 3121042213121 is 1213122401213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-3121042213121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3121042213127) 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 7 ways as a sum of consecutive naturals, for example, 9692677520 + ... + 9692677841.

It is an arithmetic number, because the mean of its divisors is an integer number (465248528688).

Almost surely, 2^{3121042213121} is an apocalyptic number.

It is an amenable number.

3121042213121 is a deficient number, since it is larger than the sum of its proper divisors (600946016383).

3121042213121 is a wasteful number, since it uses less digits than its factorization.

3121042213121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19385355391.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 3121042213121 its reverse (1213122401213), we get a palindrome (4334164614334).

The spelling of 3121042213121 in words is "three trillion, one hundred twenty-one billion, forty-two million, two hundred thirteen thousand, one hundred twenty-one".