133031233221 has 4 divisors (see below), whose sum is σ = 177374977632. Its totient is φ = 88687488812.

The previous prime is 133031233199. The next prime is 133031233243. The reversal of 133031233221 is 122332130331.

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, and also an emirpimes, since its reverse is a distinct semiprime: 122332130331 = 3 ⋅40777376777.

It is an interprime number because it is at equal distance from previous prime (133031233199) and next prime (133031233243).

It is a cyclic number.

It is not a de Polignac number, because 133031233221 - 2²¹ = 133029136069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133031233191 and 133031233200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133031233421) 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, 22171872201 + ... + 22171872206.

It is an arithmetic number, because the mean of its divisors is an integer number (44343744408).

Almost surely, 2^133031233221 is an apocalyptic number.

It is an amenable number.

133031233221 is a deficient number, since it is larger than the sum of its proper divisors (44343744411).

133031233221 is an equidigital number, since it uses as much as digits as its factorization.

133031233221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44343744410.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 133031233221 its reverse (122332130331), we get a palindrome (255363363552).

The spelling of 133031233221 in words is "one hundred thirty-three billion, thirty-one million, two hundred thirty-three thousand, two hundred twenty-one".