133111533420 has 144 divisors (see below), whose sum is σ = 425880000000. Its totient is φ = 33560355456.

The previous prime is 133111533397. The next prime is 133111533431. The reversal of 133111533420 is 24335111331.

133111533420 is a `hidden beast` number, since 1 + 3 + 311 + 1 + 5 + 3 + 342 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1667581 + ... + 1745579.

It is an arithmetic number, because the mean of its divisors is an integer number (2957500000).

Almost surely, 2^133111533420 is an apocalyptic number.

133111533420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133111533420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212940000000).

133111533420 is an abundant number, since it is smaller than the sum of its proper divisors (292768466580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133111533420 is a wasteful number, since it uses less digits than its factorization.

133111533420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78532 (or 78527 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

Adding to 133111533420 its reverse (24335111331), we get a palindrome (157446644751).

The spelling of 133111533420 in words is "one hundred thirty-three billion, one hundred eleven million, five hundred thirty-three thousand, four hundred twenty".