20021103213113 has 2 divisors, whose sum is σ = 20021103213114. Its totient is φ = 20021103213112.

The previous prime is 20021103213091. The next prime is 20021103213157. The reversal of 20021103213113 is 31131230112002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19079799649849 + 941303563264 = 4368043^2 + 970208^2 .

It is a cyclic number.

It is not a de Polignac number, because 20021103213113 - 2¹⁴ = 20021103196729 is a prime.

It is not a weakly prime, because it can be changed into another prime (20021103210113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010551606556 + 10010551606557.

It is an arithmetic number, because the mean of its divisors is an integer number (10010551606557).

Almost surely, 2^{20021103213113} is an apocalyptic number.

It is an amenable number.

20021103213113 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021103213113 is an equidigital number, since it uses as much as digits as its factorization.

20021103213113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 20021103213113 its reverse (31131230112002), we get a palindrome (51152333325115).

The spelling of 20021103213113 in words is "twenty trillion, twenty-one billion, one hundred three million, two hundred thirteen thousand, one hundred thirteen".