21601631217314 has 16 divisors (see below), whose sum is σ = 34228361179680. Its totient is φ = 10196194904640.

The previous prime is 21601631217293. The next prime is 21601631217319. The reversal of 21601631217314 is 41371213610612.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (21601631217319) 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, 1004342567 + ... + 1004364074.

It is an arithmetic number, because the mean of its divisors is an integer number (2139272573730).

Almost surely, 2^{21601631217314} is an apocalyptic number.

21601631217314 is a deficient number, since it is larger than the sum of its proper divisors (12626729962366).

21601631217314 is a wasteful number, since it uses less digits than its factorization.

21601631217314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2008706945.

The product of its (nonzero) digits is 36288, while the sum is 38.

Adding to 21601631217314 its reverse (41371213610612), we get a palindrome (62972844827926).

The spelling of 21601631217314 in words is "twenty-one trillion, six hundred one billion, six hundred thirty-one million, two hundred seventeen thousand, three hundred fourteen".