133031220121 has 2 divisors, whose sum is σ = 133031220122. Its totient is φ = 133031220120.

The previous prime is 133031220103. The next prime is 133031220143. The reversal of 133031220121 is 121022130331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113027078025 + 20004142096 = 336195^2 + 141436^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133031220121 is a prime.

It is not a weakly prime, because it can be changed into another prime (133031220151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66515610060 + 66515610061.

It is an arithmetic number, because the mean of its divisors is an integer number (66515610061).

Almost surely, 2^133031220121 is an apocalyptic number.

It is an amenable number.

133031220121 is a deficient number, since it is larger than the sum of its proper divisors (1).

133031220121 is an equidigital number, since it uses as much as digits as its factorization.

133031220121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 133031220121 its reverse (121022130331), we get a palindrome (254053350452).

The spelling of 133031220121 in words is "one hundred thirty-three billion, thirty-one million, two hundred twenty thousand, one hundred twenty-one".