21314121530 has 32 divisors (see below), whose sum is σ = 43491168000. Its totient is φ = 7455627072.

The previous prime is 21314121527. The next prime is 21314121571. The reversal of 21314121530 is 3512141312.

It is a junction number, because it is equal to n+sod(n) for n = 21314121496 and 21314121505.

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, 4312130 + ... + 4317069.

It is an arithmetic number, because the mean of its divisors is an integer number (1359099000).

Almost surely, 2^21314121530 is an apocalyptic number.

21314121530 is an abundant number, since it is smaller than the sum of its proper divisors (22177046470).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21314121530 is a wasteful number, since it uses less digits than its factorization.

21314121530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8629238.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 21314121530 its reverse (3512141312), we get a palindrome (24826262842).

The spelling of 21314121530 in words is "twenty-one billion, three hundred fourteen million, one hundred twenty-one thousand, five hundred thirty".