221002110111020 has 48 divisors (see below), whose sum is σ = 530501380819200. Its totient is φ = 75758392530624.

The previous prime is 221002110111019. The next prime is 221002110111047. The reversal of 221002110111020 is 20111011200122.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 221002110110986 and 221002110111004.

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, 142554470 + ... + 144096429.

It is an arithmetic number, because the mean of its divisors is an integer number (11052112100400).

Almost surely, 2^{221002110111020} is an apocalyptic number.

221002110111020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221002110111020 is an abundant number, since it is smaller than the sum of its proper divisors (309499270708180).

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

221002110111020 is a wasteful number, since it uses less digits than its factorization.

221002110111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286656422 (or 286656420 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221002110111020 its reverse (20111011200122), we get a palindrome (241113121311142).

The spelling of 221002110111020 in words is "two hundred twenty-one trillion, two billion, one hundred ten million, one hundred eleven thousand, twenty".