1212113321123 has 4 divisors (see below), whose sum is σ = 1212205279488. Its totient is φ = 1212021362760.

The previous prime is 1212113321119. The next prime is 1212113321173. The reversal of 1212113321123 is 3211233112121.

It is a happy number.

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 1212113321123 - 2² = 1212113321119 is a prime.

It is a super-2 number, since 2×1212113321123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212113321113) 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, 45959408 + ... + 45985773.

It is an arithmetic number, because the mean of its divisors is an integer number (303051319872).

Almost surely, 2^{1212113321123} is an apocalyptic number.

1212113321123 is a deficient number, since it is larger than the sum of its proper divisors (91958365).

1212113321123 is an equidigital number, since it uses as much as digits as its factorization.

1212113321123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91958364.

The product of its digits is 432, while the sum is 23.

Adding to 1212113321123 its reverse (3211233112121), we get a palindrome (4423346433244).

The spelling of 1212113321123 in words is "one trillion, two hundred twelve billion, one hundred thirteen million, three hundred twenty-one thousand, one hundred twenty-three".