1213003012123 has 8 divisors (see below), whose sum is σ = 1406980040192. Its totient is φ = 1024198704936.

The previous prime is 1213003012121. The next prime is 1213003012127. The reversal of 1213003012123 is 3212103003121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1213003012123 - 2¹ = 1213003012121 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 1213003012123.

It is not an unprimeable number, because it can be changed into a prime (1213003012121) 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 7 ways as a sum of consecutive naturals, for example, 1293179715 + ... + 1293180652.

It is an arithmetic number, because the mean of its divisors is an integer number (175872505024).

Almost surely, 2^{1213003012123} is an apocalyptic number.

1213003012123 is a deficient number, since it is larger than the sum of its proper divisors (193977028069).

1213003012123 is an equidigital number, since it uses as much as digits as its factorization.

1213003012123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2586360441.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1213003012123 its reverse (3212103003121), we get a palindrome (4425106015244).

The spelling of 1213003012123 in words is "one trillion, two hundred thirteen billion, three million, twelve thousand, one hundred twenty-three".