2121432412420 has 24 divisors (see below), whose sum is σ = 4459476521304. Its totient is φ = 847721830656.

The previous prime is 2121432412381. The next prime is 2121432412427. The reversal of 2121432412420 is 242142341212.

It can be written as a sum of positive squares in 4 ways, for example, as 96611558976 + 2024820853444 = 310824^2 + 1422962^2 .

It is a super-2 number, since 2×2121432412420² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2121432412427) 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 7 ways as a sum of consecutive naturals, for example, 53175457 + ... + 53215336.

It is an arithmetic number, because the mean of its divisors is an integer number (185811521721).

Almost surely, 2^{2121432412420} is an apocalyptic number.

2121432412420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121432412420 is an abundant number, since it is smaller than the sum of its proper divisors (2338044108884).

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

2121432412420 is a wasteful number, since it uses less digits than its factorization.

2121432412420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106391799 (or 106391797 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 2121432412420 its reverse (242142341212), we get a palindrome (2363574753632).

The spelling of 2121432412420 in words is "two trillion, one hundred twenty-one billion, four hundred thirty-two million, four hundred twelve thousand, four hundred twenty".