21211312441 has 16 divisors (see below), whose sum is σ = 23234853888. Its totient is φ = 19203808000.

The previous prime is 21211312429. The next prime is 21211312453. The reversal of 21211312441 is 14421311212.

It is an interprime number because it is at equal distance from previous prime (21211312429) and next prime (21211312453).

It is a cyclic number.

It is not a de Polignac number, because 21211312441 - 2¹⁹ = 21210788153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21211312481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2982696 + ... + 2989798.

It is an arithmetic number, because the mean of its divisors is an integer number (1452178368).

Almost surely, 2^21211312441 is an apocalyptic number.

It is an amenable number.

21211312441 is a deficient number, since it is larger than the sum of its proper divisors (2023541447).

21211312441 is a wasteful number, since it uses less digits than its factorization.

21211312441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8192.

The product of its digits is 384, while the sum is 22.

Adding to 21211312441 its reverse (14421311212), we get a palindrome (35632623653).

The spelling of 21211312441 in words is "twenty-one billion, two hundred eleven million, three hundred twelve thousand, four hundred forty-one".