2130402021 has 16 divisors (see below), whose sum is σ = 3182518848. Its totient is φ = 1256256000.

The previous prime is 2130402017. The next prime is 2130402047. The reversal of 2130402021 is 1202040312.

It is not a de Polignac number, because 2130402021 - 2² = 2130402017 is a prime.

It is a super-2 number, since 2×2130402021² = 9077225542161768882, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2130402091) 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, 871180 + ... + 873621.

It is an arithmetic number, because the mean of its divisors is an integer number (198907428).

Almost surely, 2^2130402021 is an apocalyptic number.

It is an amenable number.

2130402021 is a deficient number, since it is larger than the sum of its proper divisors (1052116827).

2130402021 is a wasteful number, since it uses less digits than its factorization.

2130402021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744852.

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

The square root of 2130402021 is about 46156.2782403434. The cubic root of 2130402021 is about 1286.7292944346.

Adding to 2130402021 its reverse (1202040312), we get a palindrome (3332442333).

The spelling of 2130402021 in words is "two billion, one hundred thirty million, four hundred two thousand, twenty-one".