33231054521221 has 8 divisors (see below), whose sum is σ = 35186907627864. Its totient is φ = 31275321991680.

The previous prime is 33231054521219. The next prime is 33231054521227. The reversal of 33231054521221 is 12212545013233.

It can be written as a sum of positive squares in 4 ways, for example, as 15896280636196 + 17334773885025 = 3987014^2 + 4163505^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 33231054521221 - 2¹ = 33231054521219 is a prime.

It is a super-2 number, since 2×33231054521221² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33231054521227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29576550 + ... + 30679543.

It is an arithmetic number, because the mean of its divisors is an integer number (4398363453483).

Almost surely, 2^{33231054521221} is an apocalyptic number.

It is an amenable number.

33231054521221 is a deficient number, since it is larger than the sum of its proper divisors (1955853106643).

33231054521221 is a wasteful number, since it uses less digits than its factorization.

33231054521221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60288551.

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 33231054521221 its reverse (12212545013233), we get a palindrome (45443599534454).

The spelling of 33231054521221 in words is "thirty-three trillion, two hundred thirty-one billion, fifty-four million, five hundred twenty-one thousand, two hundred twenty-one".