1212420210 has 128 divisors (see below), whose sum is σ = 3137771520. Its totient is φ = 298930176.

The previous prime is 1212420203. The next prime is 1212420227. The reversal of 1212420210 is 120242121.

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 1212420210.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6281874 + ... + 6282066.

It is an arithmetic number, because the mean of its divisors is an integer number (24513840).

Almost surely, 2^1212420210 is an apocalyptic number.

1212420210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212420210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1568885760).

1212420210 is an abundant number, since it is smaller than the sum of its proper divisors (1925351310).

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

1212420210 is a wasteful number, since it uses less digits than its factorization.

1212420210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1212420210 is about 34819.8249564813. The cubic root of 1212420210 is about 1066.3122267467.

Adding to 1212420210 its reverse (120242121), we get a palindrome (1332662331).

The spelling of 1212420210 in words is "one billion, two hundred twelve million, four hundred twenty thousand, two hundred ten".