1351161566121 has 4 divisors (see below), whose sum is σ = 1801548754832. Its totient is φ = 900774377412.

The previous prime is 1351161566093. The next prime is 1351161566123. The reversal of 1351161566121 is 1216651611531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1351161566121 - 2¹¹ = 1351161564073 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 1351161566121.

It is not an unprimeable number, because it can be changed into a prime (1351161566123) 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, 225193594351 + ... + 225193594356.

It is an arithmetic number, because the mean of its divisors is an integer number (450387188708).

Almost surely, 2^{1351161566121} is an apocalyptic number.

It is an amenable number.

1351161566121 is a deficient number, since it is larger than the sum of its proper divisors (450387188711).

1351161566121 is an equidigital number, since it uses as much as digits as its factorization.

1351161566121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450387188710.

The product of its digits is 32400, while the sum is 39.

The spelling of 1351161566121 in words is "one trillion, three hundred fifty-one billion, one hundred sixty-one million, five hundred sixty-six thousand, one hundred twenty-one".