1212020016 has 40 divisors (see below), whose sum is σ = 3203872320. Its totient is φ = 394610496.

The previous prime is 1212020011. The next prime is 1212020027. The reversal of 1212020016 is 6100202121.

It is a junction number, because it is equal to n+sod(n) for n = 1212019977 and 1212020004.

It is not an unprimeable number, because it can be changed into a prime (1212020011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291546 + ... + 295673.

It is an arithmetic number, because the mean of its divisors is an integer number (80096808).

Almost surely, 2^1212020016 is an apocalyptic number.

1212020016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1212020016 is an abundant number, since it is smaller than the sum of its proper divisors (1991852304).

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

1212020016 is a wasteful number, since it uses less digits than its factorization.

1212020016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587273 (or 587267 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1212020016 is about 34814.0778421603. The cubic root of 1212020016 is about 1066.1948915433.

Adding to 1212020016 its reverse (6100202121), we get a palindrome (7312222137).

The spelling of 1212020016 in words is "one billion, two hundred twelve million, twenty thousand, sixteen".