1213003210123 has 4 divisors (see below), whose sum is σ = 1276845484360. Its totient is φ = 1149160935888.

The previous prime is 1213003210063. The next prime is 1213003210171. The reversal of 1213003210123 is 3210123003121.

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 1213003210123 - 2²⁹ = 1212466339211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 63842274217 = 1213003210123 / (1 + 2 + 1 + 3 + 0 + 0 + 3 + 2 + 1 + 0 + 1 + 2 + 3).

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 1213003210123.

It is not an unprimeable number, because it can be changed into a prime (1213003214123) 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, 31921137090 + ... + 31921137127.

It is an arithmetic number, because the mean of its divisors is an integer number (319211371090).

Almost surely, 2^{1213003210123} is an apocalyptic number.

1213003210123 is a deficient number, since it is larger than the sum of its proper divisors (63842274237).

1213003210123 is an equidigital number, since it uses as much as digits as its factorization.

1213003210123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63842274236.

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

Adding to 1213003210123 its reverse (3210123003121), we get a palindrome (4423126213244).

The spelling of 1213003210123 in words is "one trillion, two hundred thirteen billion, three million, two hundred ten thousand, one hundred twenty-three".