102020020221 has 12 divisors (see below), whose sum is σ = 158235133632. Its totient is φ = 58297154328.

The previous prime is 102020020217. The next prime is 102020020253. The reversal of 102020020221 is 122020020201.

It is not a de Polignac number, because 102020020221 - 2² = 102020020217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102020020197 and 102020020206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102020020211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 347006725 + ... + 347007018.

It is an arithmetic number, because the mean of its divisors is an integer number (13186261136).

Almost surely, 2^102020020221 is an apocalyptic number.

It is an amenable number.

102020020221 is a deficient number, since it is larger than the sum of its proper divisors (56215113411).

102020020221 is an equidigital number, since it uses as much as digits as its factorization.

102020020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694013760 (or 694013753 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 102020020221 its reverse (122020020201), we get a palindrome (224040040422).

The spelling of 102020020221 in words is "one hundred two billion, twenty million, twenty thousand, two hundred twenty-one".