21131431212441 has 16 divisors (see below), whose sum is σ = 30749701183488. Its totient is φ = 12801480522000.

The previous prime is 21131431212371. The next prime is 21131431212467. The reversal of 21131431212441 is 14421213413112.

It is not a de Polignac number, because 21131431212441 - 2¹⁸ = 21131430950297 is a prime.

It is a super-2 number, since 2×21131431212441² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21131431212399 and 21131431212408.

It is not an unprimeable number, because it can be changed into a prime (21131431211441) 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 15 ways as a sum of consecutive naturals, for example, 136108381 + ... + 136263546.

It is an arithmetic number, because the mean of its divisors is an integer number (1921856323968).

Almost surely, 2^{21131431212441} is an apocalyptic number.

It is an amenable number.

21131431212441 is a deficient number, since it is larger than the sum of its proper divisors (9618269971047).

21131431212441 is a wasteful number, since it uses less digits than its factorization.

21131431212441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272374292.

The product of its digits is 4608, while the sum is 30.

Adding to 21131431212441 its reverse (14421213413112), we get a palindrome (35552644625553).

The spelling of 21131431212441 in words is "twenty-one trillion, one hundred thirty-one billion, four hundred thirty-one million, two hundred twelve thousand, four hundred forty-one".