2130340021 has 8 divisors (see below), whose sum is σ = 2245942080. Its totient is φ = 2015085888.

The previous prime is 2130339931. The next prime is 2130340049. The reversal of 2130340021 is 1200430312.

It is a happy number.

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

It is not a de Polignac number, because 2130340021 - 2¹¹ = 2130337973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2130339977 and 2130340004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2130340061) 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, 74356 + ... + 98941.

It is an arithmetic number, because the mean of its divisors is an integer number (280742760).

Almost surely, 2^2130340021 is an apocalyptic number.

It is an amenable number.

2130340021 is a deficient number, since it is larger than the sum of its proper divisors (115602059).

2130340021 is a wasteful number, since it uses less digits than its factorization.

2130340021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173963.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 2130340021 is about 46155.6066041819. The cubic root of 2130340021 is about 1286.7168119721.

Adding to 2130340021 its reverse (1200430312), we get a palindrome (3330770333).

The spelling of 2130340021 in words is "two billion, one hundred thirty million, three hundred forty thousand, twenty-one".