172002121512 has 32 divisors (see below), whose sum is σ = 463082635680. Its totient is φ = 52923729600.

The previous prime is 172002121477. The next prime is 172002121517. The reversal of 172002121512 is 215121200271.

It is a happy number.

172002121512 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×172002121512² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (172002121517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275644114 + ... + 275644737.

It is an arithmetic number, because the mean of its divisors is an integer number (14471332365).

Almost surely, 2^172002121512 is an apocalyptic number.

172002121512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

172002121512 is an abundant number, since it is smaller than the sum of its proper divisors (291080514168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172002121512 is a wasteful number, since it uses less digits than its factorization.

172002121512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551288873 (or 551288869 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 24.

Adding to 172002121512 its reverse (215121200271), we get a palindrome (387123321783).

The spelling of 172002121512 in words is "one hundred seventy-two billion, two million, one hundred twenty-one thousand, five hundred twelve".