20220859491121 has 3 divisors (see below), whose sum is σ = 20220863987883. Its totient is φ = 20220854994360.

The previous prime is 20220859491101. The next prime is 20220859491137. The reversal of 20220859491121 is 12119495802202.

The square root of 20220859491121 is 4496761.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 6615384617521 + 13605474873600 = 2572039^2 + 3688560^2 .

It is not a de Polignac number, because 20220859491121 - 2²⁷ = 20220725273393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20220859491101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2248381 + ... + 6745141.

It is an arithmetic number, because the mean of its divisors is an integer number (6740287995961).

Almost surely, 2^{20220859491121} is an apocalyptic number.

20220859491121 is the 4496761-st square number.

20220859491121 is the 2248381-st centered octagonal number.

It is an amenable number.

20220859491121 is a deficient number, since it is larger than the sum of its proper divisors (4496762).

20220859491121 is an frugal number, since it uses more digits than its factorization.

20220859491121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8993522 (or 4496761 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 46.

The spelling of 20220859491121 in words is "twenty trillion, two hundred twenty billion, eight hundred fifty-nine million, four hundred ninety-one thousand, one hundred twenty-one".