2130404521 has 16 divisors (see below), whose sum is σ = 2592895104. Its totient is φ = 1708694784.

The previous prime is 2130404519. The next prime is 2130404543. The reversal of 2130404521 is 1254040312.

It is a cyclic number.

It is not a de Polignac number, because 2130404521 - 2¹ = 2130404519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2130404492 and 2130404501.

It is not an unprimeable number, because it can be changed into a prime (2130404581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31155 + ... + 72328.

It is an arithmetic number, because the mean of its divisors is an integer number (162055944).

Almost surely, 2^2130404521 is an apocalyptic number.

It is an amenable number.

2130404521 is a deficient number, since it is larger than the sum of its proper divisors (462490583).

2130404521 is a wasteful number, since it uses less digits than its factorization.

2130404521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103680.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 2130404521 is about 46156.3053222417. The cubic root of 2130404521 is about 1286.7297977546.

Adding to 2130404521 its reverse (1254040312), we get a palindrome (3384444833).

The spelling of 2130404521 in words is "two billion, one hundred thirty million, four hundred four thousand, five hundred twenty-one".