1212203112 has 16 divisors (see below), whose sum is σ = 3030507840. Its totient is φ = 404067696.

The previous prime is 1212203101. The next prime is 1212203117. The reversal of 1212203112 is 2113022121.

It is a junction number, because it is equal to n+sod(n) for n = 1212203091 and 1212203100.

It is not an unprimeable number, because it can be changed into a prime (1212203117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25254208 + ... + 25254255.

It is an arithmetic number, because the mean of its divisors is an integer number (189406740).

Almost surely, 2^1212203112 is an apocalyptic number.

1212203112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1212203112 is an abundant number, since it is smaller than the sum of its proper divisors (1818304728).

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

1212203112 is a wasteful number, since it uses less digits than its factorization.

1212203112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50508472 (or 50508468 counting only the distinct ones).

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

The square root of 1212203112 is about 34816.7073687332. The cubic root of 1212203112 is about 1066.2485777278.

Adding to 1212203112 its reverse (2113022121), we get a palindrome (3325225233).

The spelling of 1212203112 in words is "one billion, two hundred twelve million, two hundred three thousand, one hundred twelve".