21175002130 has 32 divisors (see below), whose sum is σ = 39013311744. Its totient is φ = 8270497536.

The previous prime is 21175002113. The next prime is 21175002151. The reversal of 21175002130 is 3120057112.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2066199 + ... + 2076421.

It is an arithmetic number, because the mean of its divisors is an integer number (1219165992).

Almost surely, 2^21175002130 is an apocalyptic number.

21175002130 is a deficient number, since it is larger than the sum of its proper divisors (17838309614).

21175002130 is a wasteful number, since it uses less digits than its factorization.

21175002130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15090.

The product of its (nonzero) digits is 420, while the sum is 22.

Adding to 21175002130 its reverse (3120057112), we get a palindrome (24295059242).

The spelling of 21175002130 in words is "twenty-one billion, one hundred seventy-five million, two thousand, one hundred thirty".