1020020221 has 8 divisors (see below), whose sum is σ = 1114941600. Its totient is φ = 925464240.

The previous prime is 1020020201. The next prime is 1020020231. The reversal of 1020020221 is 1220200201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1020020221 - 2²³ = 1011631613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020020198 and 1020020207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020020201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85491 + ... + 96688.

It is an arithmetic number, because the mean of its divisors is an integer number (139367700).

Almost surely, 2^1020020221 is an apocalyptic number.

1020020221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1020020221 is a deficient number, since it is larger than the sum of its proper divisors (94921379).

1020020221 is a wasteful number, since it uses less digits than its factorization.

1020020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182699.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1020020221 is about 31937.7554158084. The cubic root of 1020020221 is about 1006.6293614501.

Adding to 1020020221 its reverse (1220200201), we get a palindrome (2240220422).

The spelling of 1020020221 in words is "one billion, twenty million, twenty thousand, two hundred twenty-one".