1361212252005 has 16 divisors (see below), whose sum is σ = 2177954254080. Its totient is φ = 725974984128.

The previous prime is 1361212251991. The next prime is 1361212252061. The reversal of 1361212252005 is 5002522121631.

It is not a de Polignac number, because 1361212252005 - 2⁹ = 1361212251493 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3663999 + ... + 4018371.

It is an arithmetic number, because the mean of its divisors is an integer number (136122140880).

Almost surely, 2^{1361212252005} is an apocalyptic number.

1361212252005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1361212252005 is a deficient number, since it is larger than the sum of its proper divisors (816742002075).

1361212252005 is a wasteful number, since it uses less digits than its factorization.

1361212252005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610460.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 1361212252005 its reverse (5002522121631), we get a palindrome (6363734373636).

The spelling of 1361212252005 in words is "one trillion, three hundred sixty-one billion, two hundred twelve million, two hundred fifty-two thousand, five".