131212002143402 has 16 divisors (see below), whose sum is σ = 199156176237480. Its totient is φ = 64829837356992.

The previous prime is 131212002143399. The next prime is 131212002143419. The reversal of 131212002143402 is 204341200212131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 115498460374441 + 15713541768961 = 10747021^2 + 3964031^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 806741633 + ... + 806904260.

Almost surely, 2^{131212002143402} is an apocalyptic number.

131212002143402 is a deficient number, since it is larger than the sum of its proper divisors (67944174094078).

131212002143402 is a wasteful number, since it uses less digits than its factorization.

131212002143402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1613646377.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 131212002143402 its reverse (204341200212131), we get a palindrome (335553202355533).

The spelling of 131212002143402 in words is "one hundred thirty-one trillion, two hundred twelve billion, two million, one hundred forty-three thousand, four hundred two".