131021004004402 has 32 divisors (see below), whose sum is σ = 204114542284800. Its totient is φ = 63008831623440.

The previous prime is 131021004004349. The next prime is 131021004004411. The reversal of 131021004004402 is 204400400120131.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73533849 + ... + 75294547.

It is an arithmetic number, because the mean of its divisors is an integer number (6378579446400).

Almost surely, 2^{131021004004402} is an apocalyptic number.

131021004004402 is a deficient number, since it is larger than the sum of its proper divisors (73093538280398).

131021004004402 is a wasteful number, since it uses less digits than its factorization.

131021004004402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1768086.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 131021004004402 its reverse (204400400120131), we get a palindrome (335421404124533).

The spelling of 131021004004402 in words is "one hundred thirty-one trillion, twenty-one billion, four million, four thousand, four hundred two".