1020507221 has 8 divisors (see below), whose sum is σ = 1034033280. Its totient is φ = 1007042688.

The previous prime is 1020507203. The next prime is 1020507239. The reversal of 1020507221 is 1227050201.

It is an interprime number because it is at equal distance from previous prime (1020507203) and next prime (1020507239).

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 1020507221 - 2¹⁰ = 1020506197 is a prime.

It is a super-2 number, since 2×1020507221² = 2082869976226285682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020507193 and 1020507202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020507251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18500 + ... + 48818.

It is an arithmetic number, because the mean of its divisors is an integer number (129254160).

Almost surely, 2^1020507221 is an apocalyptic number.

It is an amenable number.

1020507221 is a deficient number, since it is larger than the sum of its proper divisors (13526059).

1020507221 is an equidigital number, since it uses as much as digits as its factorization.

1020507221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30763.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 1020507221 is about 31945.3787111689. The cubic root of 1020507221 is about 1006.7895381770.

Adding to 1020507221 its reverse (1227050201), we get a palindrome (2247557422).

The spelling of 1020507221 in words is "one billion, twenty million, five hundred seven thousand, two hundred twenty-one".