221000222012020 has 192 divisors, whose sum is σ = 520221179116800. Its totient is φ = 78181698560000.

The previous prime is 221000222011973. The next prime is 221000222012039. The reversal of 221000222012020 is 20210222000122.

It is a junction number, because it is equal to n+sod(n) for n = 221000222011985 and 221000222012003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2791036830 + ... + 2791116010.

It is an arithmetic number, because the mean of its divisors is an integer number (2709485307900).

Almost surely, 2^{221000222012020} is an apocalyptic number.

221000222012020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221000222012020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260110589558400).

221000222012020 is an abundant number, since it is smaller than the sum of its proper divisors (299220957104780).

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

221000222012020 is a wasteful number, since it uses less digits than its factorization.

221000222012020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81490 (or 81488 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 221000222012020 its reverse (20210222000122), we get a palindrome (241210444012142).

The spelling of 221000222012020 in words is "two hundred twenty-one trillion, two hundred twenty-two million, twelve thousand, twenty".