2123434100420 has 48 divisors (see below), whose sum is σ = 4836677187888. Its totient is φ = 779912663040.

The previous prime is 2123434100419. The next prime is 2123434100423. The reversal of 2123434100420 is 240014343212.

It can be written as a sum of positive squares in 8 ways, for example, as 170550828484 + 1952883271936 = 412978^2 + 1397456^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2123434100420.

It is not an unprimeable number, because it can be changed into a prime (2123434100423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76149407 + ... + 76177286.

It is an arithmetic number, because the mean of its divisors is an integer number (100764108081).

Almost surely, 2^{2123434100420} is an apocalyptic number.

2123434100420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2123434100420 is an abundant number, since it is smaller than the sum of its proper divisors (2713243087468).

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

2123434100420 is a wasteful number, since it uses less digits than its factorization.

2123434100420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152326760 (or 152326758 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 2123434100420 its reverse (240014343212), we get a palindrome (2363448443632).

The spelling of 2123434100420 in words is "two trillion, one hundred twenty-three billion, four hundred thirty-four million, one hundred thousand, four hundred twenty".