172220002112020 has 12 divisors (see below), whose sum is σ = 361662004435284. Its totient is φ = 68888000844800.

The previous prime is 172220002111991. The next prime is 172220002112057. The reversal of 172220002112020 is 20211200022271.

It can be written as a sum of positive squares in 2 ways, for example, as 118893116131344 + 53326885980676 = 10903812^2 + 7302526^2 .

It is a junction number, because it is equal to n+sod(n) for n = 172220002111982 and 172220002112000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4305500052781 + ... + 4305500052820.

It is an arithmetic number, because the mean of its divisors is an integer number (30138500369607).

Almost surely, 2^{172220002112020} is an apocalyptic number.

172220002112020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172220002112020 is an abundant number, since it is smaller than the sum of its proper divisors (189442002323264).

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

172220002112020 is a wasteful number, since it uses less digits than its factorization.

172220002112020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8611000105610 (or 8611000105608 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

Adding to 172220002112020 its reverse (20211200022271), we get a palindrome (192431202134291).

The spelling of 172220002112020 in words is "one hundred seventy-two trillion, two hundred twenty billion, two million, one hundred twelve thousand, twenty".