1361250353721 has 16 divisors (see below), whose sum is σ = 1910559276800. Its totient is φ = 859722456528.

The previous prime is 1361250353717. The next prime is 1361250353731. The reversal of 1361250353721 is 1273530521631.

It is not a de Polignac number, because 1361250353721 - 2² = 1361250353717 is a prime.

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 1361250353721.

It is not an unprimeable number, because it can be changed into a prime (1361250353711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3903690 + ... + 4238076.

It is an arithmetic number, because the mean of its divisors is an integer number (119409954800).

Almost surely, 2^{1361250353721} is an apocalyptic number.

It is an amenable number.

1361250353721 is a deficient number, since it is larger than the sum of its proper divisors (549308923079).

1361250353721 is a wasteful number, since it uses less digits than its factorization.

1361250353721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405828.

The product of its (nonzero) digits is 113400, while the sum is 39.

The spelling of 1361250353721 in words is "one trillion, three hundred sixty-one billion, two hundred fifty million, three hundred fifty-three thousand, seven hundred twenty-one".