221002111122020 has 96 divisors (see below), whose sum is σ = 481076078636160. Its totient is φ = 85223476546560.

The previous prime is 221002111122017. The next prime is 221002111122077. The reversal of 221002111122020 is 20221111200122.

It is a self number, because there is not a number n which added to its sum of digits gives 221002111122020.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31660451 + ... + 38005109.

It is an arithmetic number, because the mean of its divisors is an integer number (5011209152460).

Almost surely, 2^{221002111122020} is an apocalyptic number.

221002111122020 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 221002111122020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240538039318080).

221002111122020 is an abundant number, since it is smaller than the sum of its proper divisors (260073967514140).

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

221002111122020 is a wasteful number, since it uses less digits than its factorization.

221002111122020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6345213 (or 6345211 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221002111122020 its reverse (20221111200122), we get a palindrome (241223222322142).

The spelling of 221002111122020 in words is "two hundred twenty-one trillion, two billion, one hundred eleven million, one hundred twenty-two thousand, twenty".