235012561221 has 4 divisors (see below), whose sum is σ = 313350081632. Its totient is φ = 156675040812.

The previous prime is 235012561207. The next prime is 235012561237. The reversal of 235012561221 is 122165210532.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 235012561221 - 2¹⁵ = 235012528453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (235012561291) 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, 39168760201 + ... + 39168760206.

It is an arithmetic number, because the mean of its divisors is an integer number (78337520408).

Almost surely, 2^235012561221 is an apocalyptic number.

It is an amenable number.

235012561221 is a deficient number, since it is larger than the sum of its proper divisors (78337520411).

235012561221 is an equidigital number, since it uses as much as digits as its factorization.

235012561221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78337520410.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 235012561221 its reverse (122165210532), we get a palindrome (357177771753).

The spelling of 235012561221 in words is "two hundred thirty-five billion, twelve million, five hundred sixty-one thousand, two hundred twenty-one".