1210420220 has 24 divisors (see below), whose sum is σ = 2610583584. Its totient is φ = 471082176.

The previous prime is 1210420193. The next prime is 1210420243. The reversal of 1210420220 is 220240121.

It is a junction number, because it is equal to n+sod(n) for n = 1210420195 and 1210420204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 817112 + ... + 818591.

It is an arithmetic number, because the mean of its divisors is an integer number (108774316).

Almost surely, 2^1210420220 is an apocalyptic number.

1210420220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210420220 is an abundant number, since it is smaller than the sum of its proper divisors (1400163364).

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

1210420220 is a wasteful number, since it uses less digits than its factorization.

1210420220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1635749 (or 1635747 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1210420220 is about 34791.0939753265. The cubic root of 1210420220 is about 1065.7255798919.

Adding to 1210420220 its reverse (220240121), we get a palindrome (1430660341).

The spelling of 1210420220 in words is "one billion, two hundred ten million, four hundred twenty thousand, two hundred twenty".