1361211443305 has 96 divisors (see below), whose sum is σ = 1954407997440. Its totient is φ = 891282009600.

The previous prime is 1361211443257. The next prime is 1361211443327. The reversal of 1361211443305 is 5033441121631.

It is a de Polignac number, because none of the positive numbers 2^k-1361211443305 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 940712092 + ... + 940713538.

It is an arithmetic number, because the mean of its divisors is an integer number (20358416640).

Almost surely, 2^{1361211443305} is an apocalyptic number.

It is an amenable number.

1361211443305 is a deficient number, since it is larger than the sum of its proper divisors (593196554135).

1361211443305 is a wasteful number, since it uses less digits than its factorization.

1361211443305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1871 (or 1830 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

Adding to 1361211443305 its reverse (5033441121631), we get a palindrome (6394652564936).

The spelling of 1361211443305 in words is "one trillion, three hundred sixty-one billion, two hundred eleven million, four hundred forty-three thousand, three hundred five".