221144123020 has 12 divisors (see below), whose sum is σ = 464402658384. Its totient is φ = 88457649200.

The previous prime is 221144122963. The next prime is 221144123027. The reversal of 221144123020 is 20321441122.

It is a junction number, because it is equal to n+sod(n) for n = 221144122982 and 221144123000.

It is not an unprimeable number, because it can be changed into a prime (221144123027) 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, 5528603056 + ... + 5528603095.

It is an arithmetic number, because the mean of its divisors is an integer number (38700221532).

Almost surely, 2^221144123020 is an apocalyptic number.

221144123020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221144123020 is an abundant number, since it is smaller than the sum of its proper divisors (243258535364).

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

221144123020 is a wasteful number, since it uses less digits than its factorization.

221144123020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11057206160 (or 11057206158 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 221144123020 its reverse (20321441122), we get a palindrome (241465564142).

The spelling of 221144123020 in words is "two hundred twenty-one billion, one hundred forty-four million, one hundred twenty-three thousand, twenty".