1212533504123 has 4 divisors (see below), whose sum is σ = 1212540163128. Its totient is φ = 1212526845120.

The previous prime is 1212533504107. The next prime is 1212533504137. The reversal of 1212533504123 is 3214053352121.

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 1212533504123 - 2⁴ = 1212533504107 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 1212533504123.

It is not an unprimeable number, because it can be changed into a prime (1212533509123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3048461 + ... + 3423182.

It is an arithmetic number, because the mean of its divisors is an integer number (303135040782).

Almost surely, 2^{1212533504123} is an apocalyptic number.

1212533504123 is a deficient number, since it is larger than the sum of its proper divisors (6659005).

1212533504123 is an equidigital number, since it uses as much as digits as its factorization.

1212533504123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6659004.

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 1212533504123 its reverse (3214053352121), we get a palindrome (4426586856244).

It can be divided in two parts, 1212 and 533504123, that added together give a palindrome (533505335).

The spelling of 1212533504123 in words is "one trillion, two hundred twelve billion, five hundred thirty-three million, five hundred four thousand, one hundred twenty-three".