21110222313113 has 4 divisors (see below), whose sum is σ = 21110288897460. Its totient is φ = 21110155728768.

The previous prime is 21110222313097. The next prime is 21110222313203. The reversal of 21110222313113 is 31131322201112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17152080231049 + 3958142082064 = 4141507^2 + 1989508^2 .

It is a cyclic number.

It is not a de Polignac number, because 21110222313113 - 2⁴ = 21110222313097 is a prime.

It is a super-2 number, since 2×21110222313113² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21110222313613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32814320 + ... + 33451457.

It is an arithmetic number, because the mean of its divisors is an integer number (5277572224365).

Almost surely, 2^{21110222313113} is an apocalyptic number.

It is an amenable number.

21110222313113 is a deficient number, since it is larger than the sum of its proper divisors (66584347).

21110222313113 is an equidigital number, since it uses as much as digits as its factorization.

21110222313113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66584346.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 21110222313113 its reverse (31131322201112), we get a palindrome (52241544514225).

The spelling of 21110222313113 in words is "twenty-one trillion, one hundred ten billion, two hundred twenty-two million, three hundred thirteen thousand, one hundred thirteen".