221211202102133 has 4 divisors (see below), whose sum is σ = 223168823359788. Its totient is φ = 219253580844480.

The previous prime is 221211202102117. The next prime is 221211202102153. The reversal of 221211202102133 is 331201202112122.

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 30466182865924 + 190745019236209 = 5519618^2 + 13811047^2 .

It is a cyclic number.

It is not a de Polignac number, because 221211202102133 - 2⁴ = 221211202102117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221211202102099 and 221211202102108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221211202102153) 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, 978810628658 + ... + 978810628883.

It is an arithmetic number, because the mean of its divisors is an integer number (55792205839947).

Almost surely, 2^{221211202102133} is an apocalyptic number.

It is an amenable number.

221211202102133 is a deficient number, since it is larger than the sum of its proper divisors (1957621257655).

221211202102133 is a wasteful number, since it uses less digits than its factorization.

221211202102133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1957621257654.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 221211202102133 its reverse (331201202112122), we get a palindrome (552412404214255).

The spelling of 221211202102133 in words is "two hundred twenty-one trillion, two hundred eleven billion, two hundred two million, one hundred two thousand, one hundred thirty-three".