172133321212 has 24 divisors (see below), whose sum is σ = 314668922400. Its totient is φ = 82235974656.

The previous prime is 172133321203. The next prime is 172133321219. The reversal of 172133321212 is 212123331271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172133321219) 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, 921537 + ... + 1092472.

It is an arithmetic number, because the mean of its divisors is an integer number (13111205100).

Almost surely, 2^172133321212 is an apocalyptic number.

It is an amenable number.

172133321212 is a deficient number, since it is larger than the sum of its proper divisors (142535601188).

172133321212 is a wasteful number, since it uses less digits than its factorization.

172133321212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2014965 (or 2014963 counting only the distinct ones).

The product of its digits is 3024, while the sum is 28.

Adding to 172133321212 its reverse (212123331271), we get a palindrome (384256652483).

The spelling of 172133321212 in words is "one hundred seventy-two billion, one hundred thirty-three million, three hundred twenty-one thousand, two hundred twelve".