1212534005863 has 4 divisors (see below), whose sum is σ = 1242108006048. Its totient is φ = 1182960005680.

The previous prime is 1212534005861. The next prime is 1212534005873. The reversal of 1212534005863 is 3685004352121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1212534005863 - 2¹ = 1212534005861 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212534005861) 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, 14787000031 + ... + 14787000112.

It is an arithmetic number, because the mean of its divisors is an integer number (310527001512).

Almost surely, 2^{1212534005863} is an apocalyptic number.

1212534005863 is a deficient number, since it is larger than the sum of its proper divisors (29574000185).

1212534005863 is an equidigital number, since it uses as much as digits as its factorization.

1212534005863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29574000184.

The product of its (nonzero) digits is 172800, while the sum is 40.

Adding to 1212534005863 its reverse (3685004352121), we get a palindrome (4897538357984).

The spelling of 1212534005863 in words is "one trillion, two hundred twelve billion, five hundred thirty-four million, five thousand, eight hundred sixty-three".