21146532132401 has 32 divisors (see below), whose sum is σ = 23401887344640. Its totient is φ = 18986269813056.

The previous prime is 21146532132373. The next prime is 21146532132409. The reversal of 21146532132401 is 10423123564112.

It is not a de Polignac number, because 21146532132401 - 2²² = 21146527938097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21146532132409) 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 31 ways as a sum of consecutive naturals, for example, 182260130 + ... + 182376116.

It is an arithmetic number, because the mean of its divisors is an integer number (731308979520).

Almost surely, 2^{21146532132401} is an apocalyptic number.

It is an amenable number.

21146532132401 is a deficient number, since it is larger than the sum of its proper divisors (2255355212239).

21146532132401 is a wasteful number, since it uses less digits than its factorization.

21146532132401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117893.

The product of its (nonzero) digits is 34560, while the sum is 35.

Adding to 21146532132401 its reverse (10423123564112), we get a palindrome (31569655696513).

The spelling of 21146532132401 in words is "twenty-one trillion, one hundred forty-six billion, five hundred thirty-two million, one hundred thirty-two thousand, four hundred one".