21101321134033 has 12 divisors (see below), whose sum is σ = 24593548896612. Its totient is φ = 18052131027840.

The previous prime is 21101321134013. The next prime is 21101321134063. The reversal of 21101321134033 is 33043112310112.

It can be written as a sum of positive squares in 2 ways, for example, as 7032430408129 + 14068890725904 = 2651873^2 + 3750852^2 .

It is a de Polignac number, because none of the positive numbers 2^k-21101321134033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21101321133989 and 21101321134007.

It is not an unprimeable number, because it can be changed into a prime (21101321134013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 413255860 + ... + 413306917.

It is an arithmetic number, because the mean of its divisors is an integer number (2049462408051).

Almost surely, 2^{21101321134033} is an apocalyptic number.

It is an amenable number.

21101321134033 is a deficient number, since it is larger than the sum of its proper divisors (3492227762579).

21101321134033 is an equidigital number, since it uses as much as digits as its factorization.

21101321134033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826563312 (or 826563305 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 21101321134033 its reverse (33043112310112), we get a palindrome (54144433444145).

The spelling of 21101321134033 in words is "twenty-one trillion, one hundred one billion, three hundred twenty-one million, one hundred thirty-four thousand, thirty-three".