21510220314113 has 2 divisors, whose sum is σ = 21510220314114. Its totient is φ = 21510220314112.

The previous prime is 21510220314109. The next prime is 21510220314131. The reversal of 21510220314113 is 31141302201512.

Together with next prime (21510220314131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21409434383089 + 100785931024 = 4627033^2 + 317468^2 .

It is a cyclic number.

It is not a de Polignac number, because 21510220314113 - 2² = 21510220314109 is a prime.

It is not a weakly prime, because it can be changed into another prime (21510220314133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10755110157056 + 10755110157057.

It is an arithmetic number, because the mean of its divisors is an integer number (10755110157057).

Almost surely, 2^{21510220314113} is an apocalyptic number.

It is an amenable number.

21510220314113 is a deficient number, since it is larger than the sum of its proper divisors (1).

21510220314113 is an equidigital number, since it uses as much as digits as its factorization.

21510220314113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 21510220314113 its reverse (31141302201512), we get a palindrome (52651522515625).

The spelling of 21510220314113 in words is "twenty-one trillion, five hundred ten billion, two hundred twenty million, three hundred fourteen thousand, one hundred thirteen".