3121210112011 has 4 divisors (see below), whose sum is σ = 3121266243024. Its totient is φ = 3121153981000.

The previous prime is 3121210111993. The next prime is 3121210112021. The reversal of 3121210112011 is 1102110121213.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3121210112011 - 2⁵ = 3121210111979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3121210112021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27982015 + ... + 28093336.

It is an arithmetic number, because the mean of its divisors is an integer number (780316560756).

Almost surely, 2^{3121210112011} is an apocalyptic number.

3121210112011 is a deficient number, since it is larger than the sum of its proper divisors (56131013).

3121210112011 is an equidigital number, since it uses as much as digits as its factorization.

3121210112011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56131012.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 3121210112011 its reverse (1102110121213), we get a palindrome (4223320233224).

The spelling of 3121210112011 in words is "three trillion, one hundred twenty-one billion, two hundred ten million, one hundred twelve thousand, eleven".