21401616323301 has 64 divisors (see below), whose sum is σ = 31972217978880. Its totient is φ = 12671327370240.

The previous prime is 21401616323279. The next prime is 21401616323323. The reversal of 21401616323301 is 10332361610412.

It is an interprime number because it is at equal distance from previous prime (21401616323279) and next prime (21401616323323).

It is not a de Polignac number, because 21401616323301 - 2³¹ = 21399468839653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21401616321301) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11734516 + ... + 13435106.

It is an arithmetic number, because the mean of its divisors is an integer number (499565905920).

Almost surely, 2^{21401616323301} is an apocalyptic number.

It is an amenable number.

21401616323301 is a deficient number, since it is larger than the sum of its proper divisors (10570601655579).

21401616323301 is a wasteful number, since it uses less digits than its factorization.

21401616323301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1700834.

The product of its (nonzero) digits is 15552, while the sum is 33.

Adding to 21401616323301 its reverse (10332361610412), we get a palindrome (31733977933713).

The spelling of 21401616323301 in words is "twenty-one trillion, four hundred one billion, six hundred sixteen million, three hundred twenty-three thousand, three hundred one".