1212214420 has 12 divisors (see below), whose sum is σ = 2545650324. Its totient is φ = 484885760.

The previous prime is 1212214417. The next prime is 1212214429. The reversal of 1212214420 is 244122121.

It can be written as a sum of positive squares in 2 ways, for example, as 373416976 + 838797444 = 19324^2 + 28962^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212214429) 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 3 ways as a sum of consecutive naturals, for example, 30305341 + ... + 30305380.

It is an arithmetic number, because the mean of its divisors is an integer number (212137527).

Almost surely, 2^1212214420 is an apocalyptic number.

1212214420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212214420 is an abundant number, since it is smaller than the sum of its proper divisors (1333435904).

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

1212214420 is a wasteful number, since it uses less digits than its factorization.

1212214420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60610730 (or 60610728 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1212214420 is about 34816.8697616543. The cubic root of 1212214420 is about 1066.2518932067.

Adding to 1212214420 its reverse (244122121), we get a palindrome (1456336541).

The spelling of 1212214420 in words is "one billion, two hundred twelve million, two hundred fourteen thousand, four hundred twenty".