21172000610201 has 16 divisors (see below), whose sum is σ = 24240557932800. Its totient is φ = 18114469708608.

The previous prime is 21172000610197. The next prime is 21172000610209. The reversal of 21172000610201 is 10201600027112.

It is not a de Polignac number, because 21172000610201 - 2² = 21172000610197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21172000610209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7237340 + ... + 9732578.

It is an arithmetic number, because the mean of its divisors is an integer number (1515034870800).

Almost surely, 2^{21172000610201} is an apocalyptic number.

It is an amenable number.

21172000610201 is a deficient number, since it is larger than the sum of its proper divisors (3068557322599).

21172000610201 is a wasteful number, since it uses less digits than its factorization.

21172000610201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2497448.

The product of its (nonzero) digits is 336, while the sum is 23.

Adding to 21172000610201 its reverse (10201600027112), we get a palindrome (31373600637313).

The spelling of 21172000610201 in words is "twenty-one trillion, one hundred seventy-two billion, six hundred ten thousand, two hundred one".