1331200129997 has 4 divisors (see below), whose sum is σ = 1331518831836. Its totient is φ = 1330881428160.

The previous prime is 1331200129991. The next prime is 1331200129999. The reversal of 1331200129997 is 7999210021331.

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 552912703561 + 778287426436 = 743581^2 + 882206^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331200129997 - 2¹⁶ = 1331200064461 is a prime.

It is a super-2 number, since 2×1331200129997² (a number of 25 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 (1331200129991) 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, 159344654 + ... + 159353007.

It is an arithmetic number, because the mean of its divisors is an integer number (332879707959).

Almost surely, 2^{1331200129997} is an apocalyptic number.

It is an amenable number.

1331200129997 is a deficient number, since it is larger than the sum of its proper divisors (318701839).

1331200129997 is an equidigital number, since it uses as much as digits as its factorization.

1331200129997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318701838.

The product of its (nonzero) digits is 183708, while the sum is 47.

The spelling of 1331200129997 in words is "one trillion, three hundred thirty-one billion, two hundred million, one hundred twenty-nine thousand, nine hundred ninety-seven".