21214036421201 has 12 divisors (see below), whose sum is σ = 23136674203440. Its totient is φ = 19441308397680.

The previous prime is 21214036421189. The next prime is 21214036421203. The reversal of 21214036421201 is 10212463041212.

It is a happy number.

It is not a de Polignac number, because 21214036421201 - 2³⁴ = 21196856552017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21214036421203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 451511915 + ... + 451558896.

It is an arithmetic number, because the mean of its divisors is an integer number (1928056183620).

Almost surely, 2^{21214036421201} is an apocalyptic number.

It is an amenable number.

21214036421201 is a deficient number, since it is larger than the sum of its proper divisors (1922637782239).

21214036421201 is a wasteful number, since it uses less digits than its factorization.

21214036421201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903070976 (or 903070963 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

Adding to 21214036421201 its reverse (10212463041212), we get a palindrome (31426499462413).

The spelling of 21214036421201 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, four hundred twenty-one thousand, two hundred one".