21202221121101 has 24 divisors (see below), whose sum is σ = 32122360717824. Its totient is φ = 13460179471200.

The previous prime is 21202221121063. The next prime is 21202221121117. The reversal of 21202221121101 is 10112112220212.

21202221121101 is a `hidden beast` number, since 21 + 202 + 221 + 121 + 101 = 666.

It is not a de Polignac number, because 21202221121101 - 2²¹ = 21202219023949 is a prime.

It is a super-2 number, since 2×21202221121101² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202221122101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 677328325 + ... + 677359626.

It is an arithmetic number, because the mean of its divisors is an integer number (1338431696576).

Almost surely, 2^{21202221121101} is an apocalyptic number.

It is an amenable number.

21202221121101 is a deficient number, since it is larger than the sum of its proper divisors (10920139596723).

21202221121101 is a wasteful number, since it uses less digits than its factorization.

21202221121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1354688041 (or 1354688038 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21202221121101 its reverse (10112112220212), we get a palindrome (31314333341313).

The spelling of 21202221121101 in words is "twenty-one trillion, two hundred two billion, two hundred twenty-one million, one hundred twenty-one thousand, one hundred one".