21400132511 has 2 divisors, whose sum is σ = 21400132512. Its totient is φ = 21400132510.

The previous prime is 21400132499. The next prime is 21400132517. The reversal of 21400132511 is 11523100412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21400132511 - 2⁶ = 21400132447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21400132517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10700066255 + 10700066256.

It is an arithmetic number, because the mean of its divisors is an integer number (10700066256).

Almost surely, 2^21400132511 is an apocalyptic number.

21400132511 is a deficient number, since it is larger than the sum of its proper divisors (1).

21400132511 is an equidigital number, since it uses as much as digits as its factorization.

21400132511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 21400132511 its reverse (11523100412), we get a palindrome (32923232923).

The spelling of 21400132511 in words is "twenty-one billion, four hundred million, one hundred thirty-two thousand, five hundred eleven".