3421305121 has 6 divisors (see below), whose sum is σ = 3704727030. Its totient is φ = 3158127648.

The previous prime is 3421305101. The next prime is 3421305127. The reversal of 3421305121 is 1215031243.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 38254225 + 3383050896 = 6185^2 + 58164^2 .

It is not a de Polignac number, because 3421305121 - 2¹¹ = 3421303073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3421305092 and 3421305101.

It is not an unprimeable number, because it can be changed into a prime (3421305127) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10122036 + ... + 10122373.

It is an arithmetic number, because the mean of its divisors is an integer number (617454505).

Almost surely, 2^3421305121 is an apocalyptic number.

It is an amenable number.

3421305121 is a deficient number, since it is larger than the sum of its proper divisors (283421909).

3421305121 is a wasteful number, since it uses less digits than its factorization.

3421305121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20244435 (or 20244422 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 3421305121 is about 58491.9235535984. The cubic root of 3421305121 is about 1506.8288816641.

Adding to 3421305121 its reverse (1215031243), we get a palindrome (4636336364).

The spelling of 3421305121 in words is "three billion, four hundred twenty-one million, three hundred five thousand, one hundred twenty-one".