221302102020 has 24 divisors (see below), whose sum is σ = 619645885824. Its totient is φ = 59013893856.

The previous prime is 221302102001. The next prime is 221302102031. The reversal of 221302102020 is 20201203122.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1844184124 + ... + 1844184243.

It is an arithmetic number, because the mean of its divisors is an integer number (25818578576).

Almost surely, 2^221302102020 is an apocalyptic number.

221302102020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221302102020 is an abundant number, since it is smaller than the sum of its proper divisors (398343783804).

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

221302102020 is a wasteful number, since it uses less digits than its factorization.

221302102020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3688368379 (or 3688368377 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 221302102020 its reverse (20201203122), we get a palindrome (241503305142).

The spelling of 221302102020 in words is "two hundred twenty-one billion, three hundred two million, one hundred two thousand, twenty".