221002222201020 has 144 divisors (see below), whose sum is σ = 741452500719840. Its totient is φ = 52930261928448.

The previous prime is 221002222201001. The next prime is 221002222201021. The reversal of 221002222201020 is 20102222200122.

221002222201020 is a `hidden beast` number, since 2 + 210 + 0 + 222 + 220 + 10 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 221002222200984 and 221002222201002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002222201021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1276202530 + ... + 1276375689.

Almost surely, 2^{221002222201020} is an apocalyptic number.

221002222201020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221002222201020 is an abundant number, since it is smaller than the sum of its proper divisors (520450278518820).

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

221002222201020 is a wasteful number, since it uses less digits than its factorization.

221002222201020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2552578284 (or 2552578279 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 221002222201020 its reverse (20102222200122), we get a palindrome (241104444401142).

The spelling of 221002222201020 in words is "two hundred twenty-one trillion, two billion, two hundred twenty-two million, two hundred one thousand, twenty".