221120201020020 has 48 divisors (see below), whose sum is σ = 619137210238848. Its totient is φ = 58965325283200.

The previous prime is 221120201020003. The next prime is 221120201020027. The reversal of 221120201020020 is 20020102021122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221120201020027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104705545 + ... + 106796495.

It is an arithmetic number, because the mean of its divisors is an integer number (12898691879976).

Almost surely, 2^{221120201020020} is an apocalyptic number.

221120201020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221120201020020 is an abundant number, since it is smaller than the sum of its proper divisors (398017009218828).

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

221120201020020 is a wasteful number, since it uses less digits than its factorization.

221120201020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3853480 (or 3853478 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221120201020020 its reverse (20020102021122), we get a palindrome (241140303041142).

The spelling of 221120201020020 in words is "two hundred twenty-one trillion, one hundred twenty billion, two hundred one million, twenty thousand, twenty".