221001201120020 has 12 divisors (see below), whose sum is σ = 464102522352084. Its totient is φ = 88400480448000.

The previous prime is 221001201119947. The next prime is 221001201120127. The reversal of 221001201120020 is 20021102100122.

It can be written as a sum of positive squares in 2 ways, for example, as 154766637394576 + 66234563725444 = 12440524^2 + 8138462^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221001201119977 and 221001201120004.

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, 5525030027981 + ... + 5525030028020.

It is an arithmetic number, because the mean of its divisors is an integer number (38675210196007).

Almost surely, 2^{221001201120020} is an apocalyptic number.

221001201120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221001201120020 is an abundant number, since it is smaller than the sum of its proper divisors (243101321232064).

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

221001201120020 is a wasteful number, since it uses less digits than its factorization.

221001201120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11050060056010 (or 11050060056008 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221001201120020 its reverse (20021102100122), we get a palindrome (241022303220142).

The spelling of 221001201120020 in words is "two hundred twenty-one trillion, one billion, two hundred one million, one hundred twenty thousand, twenty".