1212023420 has 12 divisors (see below), whose sum is σ = 2545249224. Its totient is φ = 484809360.

The previous prime is 1212023411. The next prime is 1212023431. The reversal of 1212023420 is 243202121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30300566 + ... + 30300605.

It is an arithmetic number, because the mean of its divisors is an integer number (212104102).

Almost surely, 2^1212023420 is an apocalyptic number.

1212023420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212023420 is an abundant number, since it is smaller than the sum of its proper divisors (1333225804).

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

1212023420 is a wasteful number, since it uses less digits than its factorization.

1212023420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60601180 (or 60601178 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1212023420 is about 34814.1267303949. The cubic root of 1212023420 is about 1066.1958896908.

Adding to 1212023420 its reverse (243202121), we get a palindrome (1455225541).

The spelling of 1212023420 in words is "one billion, two hundred twelve million, twenty-three thousand, four hundred twenty".