21121432041 has 8 divisors (see below), whose sum is σ = 28435326400. Its totient is φ = 13944246192.

The previous prime is 21121431949. The next prime is 21121432051. The reversal of 21121432041 is 14023412112.

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

It is not a de Polignac number, because 21121432041 - 2¹¹ = 21121429993 is a prime.

It is a super-2 number, since 2×21121432041² (a number of 21 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 = 21121431999 and 21121432017.

It is not an unprimeable number, because it can be changed into a prime (21121432051) 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, 34176766 + ... + 34177383.

It is an arithmetic number, because the mean of its divisors is an integer number (3554415800).

Almost surely, 2^21121432041 is an apocalyptic number.

It is an amenable number.

21121432041 is a deficient number, since it is larger than the sum of its proper divisors (7313894359).

21121432041 is a wasteful number, since it uses less digits than its factorization.

21121432041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68354255.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21121432041 its reverse (14023412112), we get a palindrome (35144844153).

The spelling of 21121432041 in words is "twenty-one billion, one hundred twenty-one million, four hundred thirty-two thousand, forty-one".