21311020130 has 16 divisors (see below), whose sum is σ = 38362192704. Its totient is φ = 8523884400.

The previous prime is 21311020121. The next prime is 21311020147. The reversal of 21311020130 is 3102011312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134579 + ... + 246441.

It is an arithmetic number, because the mean of its divisors is an integer number (2397637044).

Almost surely, 2^21311020130 is an apocalyptic number.

21311020130 is a deficient number, since it is larger than the sum of its proper divisors (17051172574).

21311020130 is a wasteful number, since it uses less digits than its factorization.

21311020130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130921.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21311020130 its reverse (3102011312), we get a palindrome (24413031442).

The spelling of 21311020130 in words is "twenty-one billion, three hundred eleven million, twenty thousand, one hundred thirty".