2021121434431 has 8 divisors (see below), whose sum is σ = 2334557379024. Its totient is φ = 1729301761920.

The previous prime is 2021121434419. The next prime is 2021121434459. The reversal of 2021121434431 is 1344341211202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2021121434431 - 2¹¹ = 2021121432383 is a prime.

It is a super-2 number, since 2×2021121434431² (a number of 25 digits) contains 22 as substring.

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 2021121434431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021121444431) 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, 5404067820 + ... + 5404068193.

It is an arithmetic number, because the mean of its divisors is an integer number (291819672378).

Almost surely, 2^{2021121434431} is an apocalyptic number.

2021121434431 is a deficient number, since it is larger than the sum of its proper divisors (313435944593).

2021121434431 is a wasteful number, since it uses less digits than its factorization.

2021121434431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10808136041.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 2021121434431 its reverse (1344341211202), we get a palindrome (3365462645633).

The spelling of 2021121434431 in words is "two trillion, twenty-one billion, one hundred twenty-one million, four hundred thirty-four thousand, four hundred thirty-one".