20201721872222 has 8 divisors (see below), whose sum is σ = 33057363063672. Its totient is φ = 9182600851000.

The previous prime is 20201721872209. The next prime is 20201721872237. The reversal of 20201721872222 is 22227812710202.

It is a happy number.

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

It is a super-2 number, since 2×20201721872222² (a number of 27 digits) contains 22 as substring.

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, 459130042529 + ... + 459130042572.

It is an arithmetic number, because the mean of its divisors is an integer number (4132170382959).

Almost surely, 2^{20201721872222} is an apocalyptic number.

20201721872222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20201721872222 is a deficient number, since it is larger than the sum of its proper divisors (12855641191450).

20201721872222 is a wasteful number, since it uses less digits than its factorization.

20201721872222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918260085114.

The product of its (nonzero) digits is 50176, while the sum is 38.

The spelling of 20201721872222 in words is "twenty trillion, two hundred one billion, seven hundred twenty-one million, eight hundred seventy-two thousand, two hundred twenty-two".