1210421212 has 96 divisors (see below), whose sum is σ = 2854462464. Its totient is φ = 433728000.

The previous prime is 1210421203. The next prime is 1210421213. The reversal of 1210421212 is 2121240121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210421213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2013712 + ... + 2014312.

It is an arithmetic number, because the mean of its divisors is an integer number (29733984).

Almost surely, 2^1210421212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1210421212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1427231232).

1210421212 is an abundant number, since it is smaller than the sum of its proper divisors (1644041252).

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

1210421212 is a wasteful number, since it uses less digits than its factorization.

1210421212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139 (or 1137 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1210421212 is about 34791.1082318457. The cubic root of 1210421212 is about 1065.7258710303.

Adding to 1210421212 its reverse (2121240121), we get a palindrome (3331661333).

The spelling of 1210421212 in words is "one billion, two hundred ten million, four hundred twenty-one thousand, two hundred twelve".