1361225435721 has 8 divisors (see below), whose sum is σ = 1839829812960. Its totient is φ = 895052341152.

The previous prime is 1361225435707. The next prime is 1361225435749. The reversal of 1361225435721 is 1275345221631.

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

It is not a de Polignac number, because 1361225435721 - 2²¹ = 1361223338569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1361225435771) 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, 3107820411 + ... + 3107820848.

It is an arithmetic number, because the mean of its divisors is an integer number (229978726620).

Almost surely, 2^{1361225435721} is an apocalyptic number.

It is an amenable number.

1361225435721 is a deficient number, since it is larger than the sum of its proper divisors (478604377239).

1361225435721 is an equidigital number, since it uses as much as digits as its factorization.

1361225435721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6215641335.

The product of its digits is 302400, while the sum is 42.

The spelling of 1361225435721 in words is "one trillion, three hundred sixty-one billion, two hundred twenty-five million, four hundred thirty-five thousand, seven hundred twenty-one".