21321202244401 has 8 divisors (see below), whose sum is σ = 22449730551200. Its totient is φ = 20193309914400.

The previous prime is 21321202244317. The next prime is 21321202244411. The reversal of 21321202244401 is 10444220212312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21321202244401 - 2⁷ = 21321202244273 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21321202244401.

It is not an unprimeable number, because it can be changed into a prime (21321202244411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158925375 + ... + 159059476.

It is an arithmetic number, because the mean of its divisors is an integer number (2806216318900).

Almost surely, 2^{21321202244401} is an apocalyptic number.

It is an amenable number.

21321202244401 is a deficient number, since it is larger than the sum of its proper divisors (1128528306799).

21321202244401 is a wasteful number, since it uses less digits than its factorization.

21321202244401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317988399.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 21321202244401 its reverse (10444220212312), we get a palindrome (31765422456713).

The spelling of 21321202244401 in words is "twenty-one trillion, three hundred twenty-one billion, two hundred two million, two hundred forty-four thousand, four hundred one".