1020120220 has 36 divisors (see below), whose sum is σ = 2492010360. Its totient is φ = 349755168.

The previous prime is 1020120197. The next prime is 1020120247. The reversal of 1020120220 is 220210201.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1020120197 and 1020120206.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 519490 + ... + 521449.

It is an arithmetic number, because the mean of its divisors is an integer number (69222510).

Almost surely, 2^1020120220 is an apocalyptic number.

1020120220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020120220 is an abundant number, since it is smaller than the sum of its proper divisors (1471890140).

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

1020120220 is a wasteful number, since it uses less digits than its factorization.

1020120220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040962 (or 1040953 counting only the distinct ones).

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

The square root of 1020120220 is about 31939.3209069949. The cubic root of 1020120220 is about 1006.6622557784.

Adding to 1020120220 its reverse (220210201), we get a palindrome (1240330421).

The spelling of 1020120220 in words is "one billion, twenty million, one hundred twenty thousand, two hundred twenty".