21033023103101 has 4 divisors (see below), whose sum is σ = 21044157579900. Its totient is φ = 21021888626304.

The previous prime is 21033023103077. The next prime is 21033023103143. The reversal of 21033023103101 is 10130132033012.

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 16598738964025 + 4434284139076 = 4074155^2 + 2105774^2 .

It is a cyclic number.

It is not a de Polignac number, because 21033023103101 - 2¹⁴ = 21033023086717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033023100101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5567235566 + ... + 5567239343.

It is an arithmetic number, because the mean of its divisors is an integer number (5261039394975).

Almost surely, 2^{21033023103101} is an apocalyptic number.

It is an amenable number.

21033023103101 is a deficient number, since it is larger than the sum of its proper divisors (11134476799).

21033023103101 is a wasteful number, since it uses less digits than its factorization.

21033023103101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11134476798.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21033023103101 its reverse (10130132033012), we get a palindrome (31163155136113).

The spelling of 21033023103101 in words is "twenty-one trillion, thirty-three billion, twenty-three million, one hundred three thousand, one hundred one".