20212421034431 has 4 divisors (see below), whose sum is σ = 20212602867912. Its totient is φ = 20212239200952.

The previous prime is 20212421034361. The next prime is 20212421034457. The reversal of 20212421034431 is 13443012421202.

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 20212421034431 - 2¹⁴ = 20212421018047 is a prime.

It is a super-2 number, since 2×20212421034431² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20212421034394 and 20212421034403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212421034331) 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 3 ways as a sum of consecutive naturals, for example, 90749900 + ... + 90972353.

It is an arithmetic number, because the mean of its divisors is an integer number (5053150716978).

Almost surely, 2^{20212421034431} is an apocalyptic number.

20212421034431 is a deficient number, since it is larger than the sum of its proper divisors (181833481).

20212421034431 is a wasteful number, since it uses less digits than its factorization.

20212421034431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181833480.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 20212421034431 its reverse (13443012421202), we get a palindrome (33655433455633).

The spelling of 20212421034431 in words is "twenty trillion, two hundred twelve billion, four hundred twenty-one million, thirty-four thousand, four hundred thirty-one".