2123430343212 has 96 divisors (see below), whose sum is σ = 5358243905280. Its totient is φ = 652209304320.

The previous prime is 2123430343127. The next prime is 2123430343241.

It is a happy number.

2123430343212 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×2123430343212² (a number of 25 digits) contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 2123430343212.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 25358998 + ... + 25442594.

It is an arithmetic number, because the mean of its divisors is an integer number (55815040680).

Almost surely, 2^{2123430343212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2123430343212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2679121952640).

2123430343212 is an abundant number, since it is smaller than the sum of its proper divisors (3234813562068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2123430343212 is a wasteful number, since it uses less digits than its factorization.

2123430343212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86671 (or 86669 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 30.

It can be divided in two parts, 2123430 and 343212, that added together give a palindrome (2466642).

The spelling of 2123430343212 in words is "two trillion, one hundred twenty-three billion, four hundred thirty million, three hundred forty-three thousand, two hundred twelve".