21130002010 has 16 divisors (see below), whose sum is σ = 40959696456. Its totient is φ = 7801846848.

The previous prime is 21130002007. The next prime is 21130002013. The reversal of 21130002010 is 1020003112.

It is an interprime number because it is at equal distance from previous prime (21130002007) and next prime (21130002013).

It can be written as a sum of positive squares in 4 ways, for example, as 11393641081 + 9736360929 = 106741^2 + 98673^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (21130002013) 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, 81269109 + ... + 81269368.

Almost surely, 2^21130002010 is an apocalyptic number.

21130002010 is a deficient number, since it is larger than the sum of its proper divisors (19829694446).

21130002010 is a wasteful number, since it uses less digits than its factorization.

21130002010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162538497.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 21130002010 its reverse (1020003112), we get a palindrome (22150005122).

The spelling of 21130002010 in words is "twenty-one billion, one hundred thirty million, two thousand, ten".