21213545150401 has 4 divisors (see below), whose sum is σ = 21320145880000. Its totient is φ = 21106944420804.

The previous prime is 21213545150393. The next prime is 21213545150417. The reversal of 21213545150401 is 10405154531212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21213545150401 - 2³ = 21213545150393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21213545150431) 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 3 ways as a sum of consecutive naturals, for example, 53300364501 + ... + 53300364898.

It is an arithmetic number, because the mean of its divisors is an integer number (5330036470000).

Almost surely, 2^{21213545150401} is an apocalyptic number.

It is an amenable number.

21213545150401 is a deficient number, since it is larger than the sum of its proper divisors (106600729599).

21213545150401 is a wasteful number, since it uses less digits than its factorization.

21213545150401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106600729598.

The product of its (nonzero) digits is 24000, while the sum is 34.

Adding to 21213545150401 its reverse (10405154531212), we get a palindrome (31618699681613).

The spelling of 21213545150401 in words is "twenty-one trillion, two hundred thirteen billion, five hundred forty-five million, one hundred fifty thousand, four hundred one".