133251421166 has 4 divisors (see below), whose sum is σ = 199877131752. Its totient is φ = 66625710582.

The previous prime is 133251421159. The next prime is 133251421211. The reversal of 133251421166 is 661124152331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 661124152331 = 17077 ⋅38714303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33312855290 + ... + 33312855293.

It is an arithmetic number, because the mean of its divisors is an integer number (49969282938).

Almost surely, 2^133251421166 is an apocalyptic number.

133251421166 is a deficient number, since it is larger than the sum of its proper divisors (66625710586).

133251421166 is an equidigital number, since it uses as much as digits as its factorization.

133251421166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66625710585.

The product of its digits is 25920, while the sum is 35.

Adding to 133251421166 its reverse (661124152331), we get a palindrome (794375573497).

The spelling of 133251421166 in words is "one hundred thirty-three billion, two hundred fifty-one million, four hundred twenty-one thousand, one hundred sixty-six".