172201002101021 has 8 divisors (see below), whose sum is σ = 176876843019744. Its totient is φ = 167587092850320.

The previous prime is 172201002101017. The next prime is 172201002101033. The reversal of 172201002101021 is 120101200102271.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172201002101021 - 2² = 172201002101017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 172201002100984 and 172201002101002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172201002601021) 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, 15482911370 + ... + 15482922491.

It is an arithmetic number, because the mean of its divisors is an integer number (22109605377468).

Almost surely, 2^{172201002101021} is an apocalyptic number.

It is an amenable number.

172201002101021 is a deficient number, since it is larger than the sum of its proper divisors (4675840918723).

172201002101021 is an equidigital number, since it uses as much as digits as its factorization.

172201002101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30965834011.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 172201002101021 its reverse (120101200102271), we get a palindrome (292302202203292).

The spelling of 172201002101021 in words is "one hundred seventy-two trillion, two hundred one billion, two million, one hundred one thousand, twenty-one".