1212200420 has 12 divisors (see below), whose sum is σ = 2545620924. Its totient is φ = 484880160.

The previous prime is 1212200417. The next prime is 1212200449. The reversal of 1212200420 is 240022121.

It can be written as a sum of positive squares in 2 ways, for example, as 311240164 + 900960256 = 17642^2 + 30016^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1212200395 and 1212200404.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30304991 + ... + 30305030.

It is an arithmetic number, because the mean of its divisors is an integer number (212135077).

Almost surely, 2^1212200420 is an apocalyptic number.

1212200420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212200420 is an abundant number, since it is smaller than the sum of its proper divisors (1333420504).

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

1212200420 is a wasteful number, since it uses less digits than its factorization.

1212200420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60610030 (or 60610028 counting only the distinct ones).

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

The square root of 1212200420 is about 34816.6687091112. The cubic root of 1212200420 is about 1066.2477884367.

Adding to 1212200420 its reverse (240022121), we get a palindrome (1452222541).

The spelling of 1212200420 in words is "one billion, two hundred twelve million, two hundred thousand, four hundred twenty".