1212121211012 has 6 divisors (see below), whose sum is σ = 2121212119278. Its totient is φ = 606060605504.

The previous prime is 1212121211003. The next prime is 1212121211027. The reversal of 1212121211012 is 2101121212121.

It can be written as a sum of positive squares in only one way, i.e., 1196691596356 + 15429614656 = 1093934^2 + 124216^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151515151373 + ... + 151515151380.

It is an arithmetic number, because the mean of its divisors is an integer number (353535353213).

Almost surely, 2^{1212121211012} is an apocalyptic number.

It is an amenable number.

1212121211012 is a deficient number, since it is larger than the sum of its proper divisors (909090908266).

1212121211012 is a wasteful number, since it uses less digits than its factorization.

1212121211012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303030302757 (or 303030302755 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1212121211012 its reverse (2101121212121), we get a palindrome (3313242423133).

The spelling of 1212121211012 in words is "one trillion, two hundred twelve billion, one hundred twenty-one million, two hundred eleven thousand, twelve".