1212214440 has 64 divisors (see below), whose sum is σ = 3828052800. Its totient is φ = 306243072.

The previous prime is 1212214439. The next prime is 1212214441. The reversal of 1212214440 is 444122121.

1212214440 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1212214439) and next prime (1212214441).

It is not an unprimeable number, because it can be changed into a prime (1212214441) 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 15 ways as a sum of consecutive naturals, for example, 263557 + ... + 268116.

It is an arithmetic number, because the mean of its divisors is an integer number (59813325).

Almost surely, 2^1212214440 is an apocalyptic number.

1212214440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212214440 is an abundant number, since it is smaller than the sum of its proper divisors (2615838360).

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

1212214440 is a wasteful number, since it uses less digits than its factorization.

1212214440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531706 (or 531702 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 1212214440 is about 34816.8700488714. The cubic root of 1212214440 is about 1066.2518990706.

Adding to 1212214440 its reverse (444122121), we get a palindrome (1656336561).

It can be divided in two parts, 12122 and 14440, that added together give a palindrome (26562).

The spelling of 1212214440 in words is "one billion, two hundred twelve million, two hundred fourteen thousand, four hundred forty".