2220020122172 has 12 divisors (see below), whose sum is σ = 3904756206120. Its totient is φ = 1104375491856.

The previous prime is 2220020122171. The next prime is 2220020122183. The reversal of 2220020122172 is 2712210200222.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220020122171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1408641422 + ... + 1408642997.

It is an arithmetic number, because the mean of its divisors is an integer number (325396350510).

Almost surely, 2^{2220020122172} is an apocalyptic number.

It is an amenable number.

2220020122172 is a deficient number, since it is larger than the sum of its proper divisors (1684736083948).

2220020122172 is a wasteful number, since it uses less digits than its factorization.

2220020122172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2817284620 (or 2817284618 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

Adding to 2220020122172 its reverse (2712210200222), we get a palindrome (4932230322394).

The spelling of 2220020122172 in words is "two trillion, two hundred twenty billion, twenty million, one hundred twenty-two thousand, one hundred seventy-two".