1212442120 has 16 divisors (see below), whose sum is σ = 2727994860. Its totient is φ = 484976832.

The previous prime is 1212442093. The next prime is 1212442141. The reversal of 1212442120 is 212442121.

It can be written as a sum of positive squares in 2 ways, for example, as 1212293124 + 148996 = 34818^2 + 386^2 .

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, 15155487 + ... + 15155566.

Almost surely, 2^1212442120 is an apocalyptic number.

1212442120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212442120 is an abundant number, since it is smaller than the sum of its proper divisors (1515552740).

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

1212442120 is a wasteful number, since it uses less digits than its factorization.

1212442120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30311064 (or 30311060 counting only the distinct ones).

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

The square root of 1212442120 is about 34820.1395746772. The cubic root of 1212442120 is about 1066.3186499213.

Adding to 1212442120 its reverse (212442121), we get a palindrome (1424884241).

Subtracting from 1212442120 its reverse (212442121), we obtain a palindrome (999999999).

The spelling of 1212442120 in words is "one billion, two hundred twelve million, four hundred forty-two thousand, one hundred twenty".