3021220121 has 8 divisors (see below), whose sum is σ = 3064483560. Its totient is φ = 2978007552.

The previous prime is 3021220117. The next prime is 3021220133. The reversal of 3021220121 is 1210221203.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16974400 + 3004245721 = 4120^2 + 54811^2 .

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

It is not a de Polignac number, because 3021220121 - 2² = 3021220117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3021220096 and 3021220105.

It is not an unprimeable number, because it can be changed into a prime (3021220421) 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, 116165 + ... + 139773.

It is an arithmetic number, because the mean of its divisors is an integer number (383060445).

Almost surely, 2^3021220121 is an apocalyptic number.

It is an amenable number.

3021220121 is a deficient number, since it is larger than the sum of its proper divisors (43263439).

3021220121 is a wasteful number, since it uses less digits than its factorization.

3021220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25435.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 3021220121 is about 54965.6267225254. The cubic root of 3021220121 is about 1445.6421073194.

Adding to 3021220121 its reverse (1210221203), we get a palindrome (4231441324).

The spelling of 3021220121 in words is "three billion, twenty-one million, two hundred twenty thousand, one hundred twenty-one".