1021301220 has 48 divisors (see below), whose sum is σ = 2862498240. Its totient is φ = 272075136.

The previous prime is 1021301209. The next prime is 1021301227. The reversal of 1021301220 is 221031201.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1021301196 and 1021301205.

It is not an unprimeable number, because it can be changed into a prime (1021301227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56179 + ... + 72101.

It is an arithmetic number, because the mean of its divisors is an integer number (59635380).

Almost surely, 2^1021301220 is an apocalyptic number.

1021301220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021301220 is an abundant number, since it is smaller than the sum of its proper divisors (1841197020).

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

1021301220 is a wasteful number, since it uses less digits than its factorization.

1021301220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17004 (or 17002 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1021301220 is about 31957.8037418093. The cubic root of 1021301220 is about 1007.0505791704.

Adding to 1021301220 its reverse (221031201), we get a palindrome (1242332421).

The spelling of 1021301220 in words is "one billion, twenty-one million, three hundred one thousand, two hundred twenty".