133330131421 has 8 divisors (see below), whose sum is σ = 135855651384. Its totient is φ = 130804976640.

The previous prime is 133330131401. The next prime is 133330131437. The reversal of 133330131421 is 124131033331.

It can be written as a sum of positive squares in 4 ways, for example, as 20760487225 + 112569644196 = 144085^2 + 335514^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133330131421 is a prime.

It is a super-2 number, since 2×133330131421² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133330131401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 712141 + ... + 879661.

It is an arithmetic number, because the mean of its divisors is an integer number (16981956423).

Almost surely, 2^133330131421 is an apocalyptic number.

It is an amenable number.

133330131421 is a deficient number, since it is larger than the sum of its proper divisors (2525519963).

133330131421 is a wasteful number, since it uses less digits than its factorization.

133330131421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182591.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 133330131421 its reverse (124131033331), we get a palindrome (257461164752).

The spelling of 133330131421 in words is "one hundred thirty-three billion, three hundred thirty million, one hundred thirty-one thousand, four hundred twenty-one".