133402134421 has 4 divisors (see below), whose sum is σ = 133921209132. Its totient is φ = 132883059712.

The previous prime is 133402134401. The next prime is 133402134433. The reversal of 133402134421 is 124431204331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 132467609521 + 934524900 = 363961^2 + 30570^2 .

It is a cyclic number.

It is not a de Polignac number, because 133402134421 - 2¹³ = 133402126229 is a prime.

It is a super-2 number, since 2×133402134421² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133402134421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133402134401) 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, 259536970 + ... + 259537483.

It is an arithmetic number, because the mean of its divisors is an integer number (33480302283).

Almost surely, 2^133402134421 is an apocalyptic number.

It is an amenable number.

133402134421 is a deficient number, since it is larger than the sum of its proper divisors (519074711).

133402134421 is an equidigital number, since it uses as much as digits as its factorization.

133402134421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519074710.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 133402134421 its reverse (124431204331), we get a palindrome (257833338752).

The spelling of 133402134421 in words is "one hundred thirty-three billion, four hundred two million, one hundred thirty-four thousand, four hundred twenty-one".