235220421331 has 4 divisors (see below), whose sum is σ = 268823338672. Its totient is φ = 201617503992.

The previous prime is 235220421313. The next prime is 235220421347. The reversal of 235220421331 is 133124022532.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 235220421331 - 2¹¹ = 235220419283 is a prime.

It is a super-2 number, since 2×235220421331² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 235220421331.

It is not an unprimeable number, because it can be changed into a prime (235220421311) 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, 16801458660 + ... + 16801458673.

It is an arithmetic number, because the mean of its divisors is an integer number (67205834668).

Almost surely, 2^235220421331 is an apocalyptic number.

235220421331 is a deficient number, since it is larger than the sum of its proper divisors (33602917341).

235220421331 is an equidigital number, since it uses as much as digits as its factorization.

235220421331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33602917340.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 235220421331 its reverse (133124022532), we get a palindrome (368344443863).

The spelling of 235220421331 in words is "two hundred thirty-five billion, two hundred twenty million, four hundred twenty-one thousand, three hundred thirty-one".