21202101102001 has 4 divisors (see below), whose sum is σ = 21407946743872. Its totient is φ = 20996255460132.

The previous prime is 21202101101771. The next prime is 21202101102029. The reversal of 21202101102001 is 10020110120212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21202101102001 - 2¹³ = 21202101093809 is a prime.

It is a super-2 number, since 2×21202101102001² (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 (21202101100001) 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, 102922820781 + ... + 102922820986.

It is an arithmetic number, because the mean of its divisors is an integer number (5351986685968).

Almost surely, 2^{21202101102001} is an apocalyptic number.

It is an amenable number.

21202101102001 is a deficient number, since it is larger than the sum of its proper divisors (205845641871).

21202101102001 is a wasteful number, since it uses less digits than its factorization.

21202101102001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205845641870.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21202101102001 its reverse (10020110120212), we get a palindrome (31222211222213).

The spelling of 21202101102001 in words is "twenty-one trillion, two hundred two billion, one hundred one million, one hundred two thousand, one".