1222100012 has 24 divisors (see below), whose sum is σ = 2587977504. Its totient is φ = 492947712.

The previous prime is 1222099999. The next prime is 1222100017. The reversal of 1222100012 is 2100012221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1222099966 and 1222100002.

It is not an unprimeable number, because it can be changed into a prime (1222100017) 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, 1283243 + ... + 1284194.

It is an arithmetic number, because the mean of its divisors is an integer number (107832396).

Almost surely, 2^1222100012 is an apocalyptic number.

It is an amenable number.

1222100012 is an abundant number, since it is smaller than the sum of its proper divisors (1365877492).

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

1222100012 is a wasteful number, since it uses less digits than its factorization.

1222100012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2567465 (or 2567463 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1222100012 is about 34958.5470521874. The cubic root of 1222100012 is about 1069.1424730396.

Adding to 1222100012 its reverse (2100012221), we get a palindrome (3322112233).

The spelling of 1222100012 in words is "one billion, two hundred twenty-two million, one hundred thousand, twelve".