13131333400021 has 8 divisors (see below), whose sum is σ = 13243400317400. Its totient is φ = 13019742351360.

The previous prime is 13131333400019. The next prime is 13131333400043. The reversal of 13131333400021 is 12000433313131.

It can be written as a sum of positive squares in 4 ways, for example, as 10893227639121 + 2238105760900 = 3300489^2 + 1496030^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 13131333400021 - 2¹ = 13131333400019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13131333403021) 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, 118911756 + ... + 119022133.

It is an arithmetic number, because the mean of its divisors is an integer number (1655425039675).

Almost surely, 2^{13131333400021} is an apocalyptic number.

It is an amenable number.

13131333400021 is a deficient number, since it is larger than the sum of its proper divisors (112066917379).

13131333400021 is a wasteful number, since it uses less digits than its factorization.

13131333400021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237934359.

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

Adding to 13131333400021 its reverse (12000433313131), we get a palindrome (25131766713152).

The spelling of 13131333400021 in words is "thirteen trillion, one hundred thirty-one billion, three hundred thirty-three million, four hundred thousand, twenty-one".