221220333402133 has 4 divisors (see below), whose sum is σ = 238237282125388. Its totient is φ = 204203384678880.

The previous prime is 221220333402017. The next prime is 221220333402143. The reversal of 221220333402133 is 331204333022122.

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 111301191803844 + 109919141598289 = 10549938^2 + 10484233^2 .

It is a cyclic number.

It is not a de Polignac number, because 221220333402133 - 2²¹ = 221220331304981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221220333402095 and 221220333402104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221220333402143) 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, 8508474361608 + ... + 8508474361633.

It is an arithmetic number, because the mean of its divisors is an integer number (59559320531347).

Almost surely, 2^{221220333402133} is an apocalyptic number.

It is an amenable number.

221220333402133 is a deficient number, since it is larger than the sum of its proper divisors (17016948723255).

221220333402133 is a wasteful number, since it uses less digits than its factorization.

221220333402133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17016948723254.

The product of its (nonzero) digits is 31104, while the sum is 31.

Adding to 221220333402133 its reverse (331204333022122), we get a palindrome (552424666424255).

The spelling of 221220333402133 in words is "two hundred twenty-one trillion, two hundred twenty billion, three hundred thirty-three million, four hundred two thousand, one hundred thirty-three".