3121130002121 has 4 divisors (see below), whose sum is σ = 3124526227200. Its totient is φ = 3117733777044.

The previous prime is 3121130002099. The next prime is 3121130002139. The reversal of 3121130002121 is 1212000311213.

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.

It is a cyclic number.

It is not a de Polignac number, because 3121130002121 - 2¹⁰ = 3121130001097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3121130002121.

It is not an unprimeable number, because it can be changed into a prime (3121130002021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1698111161 + ... + 1698112998.

It is an arithmetic number, because the mean of its divisors is an integer number (781131556800).

Almost surely, 2^{3121130002121} is an apocalyptic number.

It is an amenable number.

3121130002121 is a deficient number, since it is larger than the sum of its proper divisors (3396225079).

3121130002121 is an equidigital number, since it uses as much as digits as its factorization.

3121130002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3396225078.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 3121130002121 its reverse (1212000311213), we get a palindrome (4333130313334).

The spelling of 3121130002121 in words is "three trillion, one hundred twenty-one billion, one hundred thirty million, two thousand, one hundred twenty-one".