1012220520 has 64 divisors (see below), whose sum is σ = 3088152000. Its totient is φ = 265348608.

The previous prime is 1012220513. The next prime is 1012220557. The reversal of 1012220520 is 250222101.

It is a super-2 number, since 2×1012220520² = 2049180762218140800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1012220520.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64405 + ... + 78564.

It is an arithmetic number, because the mean of its divisors is an integer number (48252375).

Almost surely, 2^1012220520 is an apocalyptic number.

1012220520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012220520 is an abundant number, since it is smaller than the sum of its proper divisors (2075931480).

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

1012220520 is a wasteful number, since it uses less digits than its factorization.

1012220520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143042 (or 143038 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1012220520 is about 31815.4132457839. The cubic root of 1012220520 is about 1004.0570249564.

Adding to 1012220520 its reverse (250222101), we get a palindrome (1262442621).

The spelling of 1012220520 in words is "one billion, twelve million, two hundred twenty thousand, five hundred twenty".