42211042133221 has 4 divisors (see below), whose sum is σ = 45458045374252. Its totient is φ = 38964038892192.

The previous prime is 42211042133213. The next prime is 42211042133317. The reversal of 42211042133221 is 12233124011224.

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 28770672268900 + 13440369864321 = 5363830^2 + 3666111^2 .

It is a cyclic number.

It is not a de Polignac number, because 42211042133221 - 2³ = 42211042133213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42211042133221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42211042133921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1623501620496 + ... + 1623501620521.

It is an arithmetic number, because the mean of its divisors is an integer number (11364511343563).

Almost surely, 2^{42211042133221} is an apocalyptic number.

It is an amenable number.

42211042133221 is a deficient number, since it is larger than the sum of its proper divisors (3247003241031).

42211042133221 is a wasteful number, since it uses less digits than its factorization.

42211042133221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3247003241030.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 42211042133221 its reverse (12233124011224), we get a palindrome (54444166144445).

The spelling of 42211042133221 in words is "forty-two trillion, two hundred eleven billion, forty-two million, one hundred thirty-three thousand, two hundred twenty-one".