1210210000 has 50 divisors (see below), whose sum is σ = 2930063642. Its totient is φ = 484080000.

The previous prime is 1210209989. The next prime is 1210210009. The reversal of 1210210000 is 120121.

It can be written as a sum of positive squares in 5 ways, for example, as 863654544 + 346555456 = 29388^2 + 18616^2 .

It is a tau number, because it is divible by the number of its divisors (50).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210210009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 50511 + ... + 70510.

Almost surely, 2^1210210000 is an apocalyptic number.

1210210000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210210000 is an abundant number, since it is smaller than the sum of its proper divisors (1719853642).

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

1210210000 is an equidigital number, since it uses as much as digits as its factorization.

1210210000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121049 (or 121028 counting only the distinct ones).

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

The square root of 1210210000 is about 34788.0726686604. The cubic root of 1210210000 is about 1065.6638796110.

Adding to 1210210000 its reverse (120121), we get a palindrome (1210330121).

The spelling of 1210210000 in words is "one billion, two hundred ten million, two hundred ten thousand".