1210010020 has 24 divisors (see below), whose sum is σ = 2690493624. Its totient is φ = 455533056.

The previous prime is 1210009987. The next prime is 1210010027. The reversal of 1210010020 is 200100121.

It can be written as a sum of positive squares in 4 ways, for example, as 503194624 + 706815396 = 22432^2 + 26586^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1210009985 and 1210010012.

It is not an unprimeable number, because it can be changed into a prime (1210010027) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1779087 + ... + 1779766.

It is an arithmetic number, because the mean of its divisors is an integer number (112103901).

Almost surely, 2^1210010020 is an apocalyptic number.

1210010020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210010020 is an abundant number, since it is smaller than the sum of its proper divisors (1480483604).

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

1210010020 is a wasteful number, since it uses less digits than its factorization.

1210010020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3558879 (or 3558877 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 1210010020 is about 34785.1982889274. The cubic root of 1210010020 is about 1065.6051781729.

Adding to 1210010020 its reverse (200100121), we get a palindrome (1410110141).

The spelling of 1210010020 in words is "one billion, two hundred ten million, ten thousand, twenty".