1213030111123 has 16 divisors (see below), whose sum is σ = 1292639541120. Its totient is φ = 1134361143936.

The previous prime is 1213030111091. The next prime is 1213030111151. The reversal of 1213030111123 is 3211110303121.

It is not a de Polignac number, because 1213030111123 - 2⁵ = 1213030111091 is a prime.

It is a super-2 number, since 2×1213030111123² (a number of 25 digits) contains 22 as substring.

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 1213030111123.

It is not an unprimeable number, because it can be changed into a prime (1213030118123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1306108 + ... + 2032726.

It is an arithmetic number, because the mean of its divisors is an integer number (80789971320).

Almost surely, 2^{1213030111123} is an apocalyptic number.

1213030111123 is a deficient number, since it is larger than the sum of its proper divisors (79609429997).

1213030111123 is a wasteful number, since it uses less digits than its factorization.

1213030111123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727266.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 1213030111123 its reverse (3211110303121), we get a palindrome (4424140414244).

The spelling of 1213030111123 in words is "one trillion, two hundred thirteen billion, thirty million, one hundred eleven thousand, one hundred twenty-three".