1012212520 has 128 divisors (see below), whose sum is σ = 2682720000. Its totient is φ = 339834880.

The previous prime is 1012212449. The next prime is 1012212547. The reversal of 1012212520 is 252122101.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1012212494 and 1012212503.

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 31 ways as a sum of consecutive naturals, for example, 291756 + ... + 295204.

It is an arithmetic number, because the mean of its divisors is an integer number (20958750).

Almost surely, 2^1012212520 is an apocalyptic number.

1012212520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1012212520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1341360000).

1012212520 is an abundant number, since it is smaller than the sum of its proper divisors (1670507480).

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

1012212520 is a wasteful number, since it uses less digits than its factorization.

1012212520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3523 (or 3519 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 1012212520 is about 31815.2875203101. The cubic root of 1012212520 is about 1004.0543797892.

Adding to 1012212520 its reverse (252122101), we get a palindrome (1264334621).

The spelling of 1012212520 in words is "one billion, twelve million, two hundred twelve thousand, five hundred twenty".