133143422421 has 4 divisors (see below), whose sum is σ = 177524563232. Its totient is φ = 88762281612.

The previous prime is 133143422411. The next prime is 133143422473. The reversal of 133143422421 is 124224341331.

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: 124224341331 = 3 ⋅41408113777.

It is not a de Polignac number, because 133143422421 - 2¹⁷ = 133143291349 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 (133143422411) 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, 22190570401 + ... + 22190570406.

It is an arithmetic number, because the mean of its divisors is an integer number (44381140808).

Almost surely, 2^133143422421 is an apocalyptic number.

It is an amenable number.

133143422421 is a deficient number, since it is larger than the sum of its proper divisors (44381140811).

133143422421 is an equidigital number, since it uses as much as digits as its factorization.

133143422421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44381140810.

The product of its digits is 13824, while the sum is 30.

Adding to 133143422421 its reverse (124224341331), we get a palindrome (257367763752).

The spelling of 133143422421 in words is "one hundred thirty-three billion, one hundred forty-three million, four hundred twenty-two thousand, four hundred twenty-one".