1212121102202 has 16 divisors (see below), whose sum is σ = 1972087993512. Its totient is φ = 556497492480.

The previous prime is 1212121102187. The next prime is 1212121102259. The reversal of 1212121102202 is 2022011212121.

It can be written as a sum of positive squares in 4 ways, for example, as 742335604921 + 469785497281 = 861589^2 + 685409^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 434762273 + ... + 434765060.

Almost surely, 2^{1212121102202} is an apocalyptic number.

1212121102202 is a deficient number, since it is larger than the sum of its proper divisors (759966891310).

1212121102202 is a wasteful number, since it uses less digits than its factorization.

1212121102202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869527393.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1212121102202 its reverse (2022011212121), we get a palindrome (3234132314323).

The spelling of 1212121102202 in words is "one trillion, two hundred twelve billion, one hundred twenty-one million, one hundred two thousand, two hundred two".