21342431011211 has 8 divisors (see below), whose sum is σ = 21410864567664. Its totient is φ = 21273999027840.

The previous prime is 21342431011199. The next prime is 21342431011247. The reversal of 21342431011211 is 11211013424312.

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 a de Polignac number, because none of the positive numbers 2^k-21342431011211 is a prime.

It is a super-2 number, since 2×21342431011211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21342431011261) 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 7 ways as a sum of consecutive naturals, for example, 30723956 + ... + 31410926.

It is an arithmetic number, because the mean of its divisors is an integer number (2676358070958).

Almost surely, 2^{21342431011211} is an apocalyptic number.

21342431011211 is a deficient number, since it is larger than the sum of its proper divisors (68433556453).

21342431011211 is an equidigital number, since it uses as much as digits as its factorization.

21342431011211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786541.

The product of its (nonzero) digits is 1152, while the sum is 26.

Adding to 21342431011211 its reverse (11211013424312), we get a palindrome (32553444435523).

The spelling of 21342431011211 in words is "twenty-one trillion, three hundred forty-two billion, four hundred thirty-one million, eleven thousand, two hundred eleven".