21021304142313 has 18 divisors (see below), whose sum is σ = 32255295979374. Its totient is φ = 13189837891584.

The previous prime is 21021304142303. The next prime is 21021304142323. The reversal of 21021304142313 is 31324140312012.

21021304142313 is a `hidden beast` number, since 2 + 1 + 0 + 2 + 1 + 304 + 1 + 42 + 313 = 666.

It is an interprime number because it is at equal distance from previous prime (21021304142303) and next prime (21021304142323).

It can be written as a sum of positive squares in 3 ways, for example, as 6136306802649 + 14884997339664 = 2477157^2 + 3858108^2 .

It is not a de Polignac number, because 21021304142313 - 2⁴ = 21021304142297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21021304142303) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4041001656 + ... + 4041006857.

It is an arithmetic number, because the mean of its divisors is an integer number (1791960887743).

Almost surely, 2^{21021304142313} is an apocalyptic number.

It is an amenable number.

21021304142313 is a deficient number, since it is larger than the sum of its proper divisors (11233991837061).

21021304142313 is a wasteful number, since it uses less digits than its factorization.

21021304142313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8082008553 (or 8082008533 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 21021304142313 its reverse (31324140312012), we get a palindrome (52345444454325).

The spelling of 21021304142313 in words is "twenty-one trillion, twenty-one billion, three hundred four million, one hundred forty-two thousand, three hundred thirteen".