21110220021113 has 2 divisors, whose sum is σ = 21110220021114. Its totient is φ = 21110220021112.

The previous prime is 21110220021091. The next prime is 21110220021127. The reversal of 21110220021113 is 31112002201112.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14522440532224 + 6587779488889 = 3810832^2 + 2566667^2 .

It is a cyclic number.

It is not a de Polignac number, because 21110220021113 - 2¹² = 21110220017017 is a prime.

It is a super-3 number, since 3×21110220021113³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21110220021091 and 21110220021100.

It is not a weakly prime, because it can be changed into another prime (21110220021133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555110010556 + 10555110010557.

It is an arithmetic number, because the mean of its divisors is an integer number (10555110010557).

Almost surely, 2^{21110220021113} is an apocalyptic number.

It is an amenable number.

21110220021113 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110220021113 is an equidigital number, since it uses as much as digits as its factorization.

21110220021113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 21110220021113 its reverse (31112002201112), we get a palindrome (52222222222225).

The spelling of 21110220021113 in words is "twenty-one trillion, one hundred ten billion, two hundred twenty million, twenty-one thousand, one hundred thirteen".