21421401041233 has 16 divisors (see below), whose sum is σ = 21901902520320. Its totient is φ = 20941937585856.

The previous prime is 21421401041231. The next prime is 21421401041251. The reversal of 21421401041233 is 33214010412412.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21421401041233 - 2¹ = 21421401041231 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21421401041231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 276448491 + ... + 276525967.

It is an arithmetic number, because the mean of its divisors is an integer number (1368868907520).

Almost surely, 2^{21421401041233} is an apocalyptic number.

It is an amenable number.

21421401041233 is a deficient number, since it is larger than the sum of its proper divisors (480501479087).

21421401041233 is a wasteful number, since it uses less digits than its factorization.

21421401041233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84096.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 21421401041233 its reverse (33214010412412), we get a palindrome (54635411453645).

The spelling of 21421401041233 in words is "twenty-one trillion, four hundred twenty-one billion, four hundred one million, forty-one thousand, two hundred thirty-three".