3121211312020 has 24 divisors (see below), whose sum is σ = 6899519743200. Its totient is φ = 1182774812832.

The previous prime is 3121211312017. The next prime is 3121211312029. The reversal of 3121211312020 is 202131121213.

3121211312020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121211312029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4106856610 + ... + 4106857369.

It is an arithmetic number, because the mean of its divisors is an integer number (287479989300).

Almost surely, 2^{3121211312020} is an apocalyptic number.

It is an amenable number.

3121211312020 is an abundant number, since it is smaller than the sum of its proper divisors (3778308431180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3121211312020 is a wasteful number, since it uses less digits than its factorization.

3121211312020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8213714007 (or 8213714005 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 3121211312020 its reverse (202131121213), we get a palindrome (3323342433233).

The spelling of 3121211312020 in words is "three trillion, one hundred twenty-one billion, two hundred eleven million, three hundred twelve thousand, twenty".