1212030112123 has 4 divisors (see below), whose sum is σ = 1212036558480. Its totient is φ = 1212023665768.

The previous prime is 1212030112121. The next prime is 1212030112129. The reversal of 1212030112123 is 3212110302121.

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 1212030112123 - 2¹ = 1212030112121 is a prime.

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 1212030112123.

It is not an unprimeable number, because it can be changed into a prime (1212030112121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2932408 + ... + 3320101.

It is an arithmetic number, because the mean of its divisors is an integer number (303009139620).

Almost surely, 2^{1212030112123} is an apocalyptic number.

1212030112123 is a deficient number, since it is larger than the sum of its proper divisors (6446357).

1212030112123 is an equidigital number, since it uses as much as digits as its factorization.

1212030112123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6446356.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1212030112123 its reverse (3212110302121), we get a palindrome (4424140414244).

The spelling of 1212030112123 in words is "one trillion, two hundred twelve billion, thirty million, one hundred twelve thousand, one hundred twenty-three".