221201000201020 has 48 divisors (see below), whose sum is σ = 530887903902720. Its totient is φ = 75839556723264.

The previous prime is 221201000200991. The next prime is 221201000201039. The reversal of 221201000201020 is 20102000102122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5444367 + ... + 21726553.

It is an arithmetic number, because the mean of its divisors is an integer number (11060164664640).

Almost surely, 2^{221201000201020} is an apocalyptic number.

221201000201020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221201000201020 is an abundant number, since it is smaller than the sum of its proper divisors (309686903701700).

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

221201000201020 is a wasteful number, since it uses less digits than its factorization.

221201000201020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16379242 (or 16379240 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221201000201020 its reverse (20102000102122), we get a palindrome (241303000303142).

The spelling of 221201000201020 in words is "two hundred twenty-one trillion, two hundred one billion, two hundred one thousand, twenty".