221022221121020 has 72 divisors (see below), whose sum is σ = 526635085087104. Its totient is φ = 77779080720000.

The previous prime is 221022221120993. The next prime is 221022221121059. The reversal of 221022221121020 is 20121122220122.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 221022221120983 and 221022221121001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1473013631 + ... + 1473163670.

Almost surely, 2^{221022221121020} is an apocalyptic number.

221022221121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221022221121020 is an abundant number, since it is smaller than the sum of its proper divisors (305612863966084).

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

221022221121020 is a wasteful number, since it uses less digits than its factorization.

221022221121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2946177363 (or 2946177350 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221022221121020 its reverse (20121122220122), we get a palindrome (241143343341142).

The spelling of 221022221121020 in words is "two hundred twenty-one trillion, twenty-two billion, two hundred twenty-one million, one hundred twenty-one thousand, twenty".