3121222020 has 48 divisors (see below), whose sum is σ = 9987911808. Its totient is φ = 713422080.

The previous prime is 3121222019. The next prime is 3121222021. The reversal of 3121222020 is 202221213.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3121222019) and next prime (3121222021).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (3121222021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3715321 + ... + 3716160.

It is an arithmetic number, because the mean of its divisors is an integer number (208081496).

Almost surely, 2^3121222020 is an apocalyptic number.

3121222020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3121222020 is an abundant number, since it is smaller than the sum of its proper divisors (6866689788).

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

3121222020 is a wasteful number, since it uses less digits than its factorization.

3121222020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7431500 (or 7431498 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 3121222020 is about 55867.8979379035. The cubic root of 3121222020 is about 1461.4194645598.

Adding to 3121222020 its reverse (202221213), we get a palindrome (3323443233).

The spelling of 3121222020 in words is "three billion, one hundred twenty-one million, two hundred twenty-two thousand, twenty".