1213212210123 has 12 divisors (see below), whose sum is σ = 1707234912168. Its totient is φ = 766239289920.

The previous prime is 1213212210071. The next prime is 1213212210131. The reversal of 1213212210123 is 3210122123121.

It is not a de Polignac number, because 1213212210123 - 2¹⁶ = 1213212144587 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1213212210123.

It is not an unprimeable number, because it can be changed into a prime (1213212218123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 560115358 + ... + 560117523.

It is an arithmetic number, because the mean of its divisors is an integer number (142269576014).

Almost surely, 2^{1213212210123} is an apocalyptic number.

1213212210123 is a deficient number, since it is larger than the sum of its proper divisors (494022702045).

1213212210123 is a wasteful number, since it uses less digits than its factorization.

1213212210123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120232922 (or 1120232903 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 1213212210123 its reverse (3210122123121), we get a palindrome (4423334333244).

The spelling of 1213212210123 in words is "one trillion, two hundred thirteen billion, two hundred twelve million, two hundred ten thousand, one hundred twenty-three".