1210213123 has 48 divisors (see below), whose sum is σ = 1526031360. Its totient is φ = 954676800.

The previous prime is 1210213117. The next prime is 1210213141. The reversal of 1210213123 is 3213120121.

It is a de Polignac number, because none of the positive numbers 2^k-1210213123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1210213097 and 1210213106.

It is not an unprimeable number, because it can be changed into a prime (1210213423) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3656068 + ... + 3656398.

It is an arithmetic number, because the mean of its divisors is an integer number (31792320).

Almost surely, 2^1210213123 is an apocalyptic number.

1210213123 is a deficient number, since it is larger than the sum of its proper divisors (315818237).

1210213123 is a wasteful number, since it uses less digits than its factorization.

1210213123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488 (or 481 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1210213123 is about 34788.1175547054. The cubic root of 1210213123 is about 1065.6647962744.

Adding to 1210213123 its reverse (3213120121), we get a palindrome (4423333244).

The spelling of 1210213123 in words is "one billion, two hundred ten million, two hundred thirteen thousand, one hundred twenty-three".