1212121020010 has 16 divisors (see below), whose sum is σ = 2181859010856. Its totient is φ = 484839258048.

The previous prime is 1212121019927. The next prime is 1212121020017. The reversal of 1212121020010 is 100201212121.

It can be written as a sum of positive squares in 4 ways, for example, as 516496630329 + 695624389681 = 718677^2 + 834041^2 .

It is not an unprimeable number, because it can be changed into a prime (1212121020017) by changing a digit.

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, 573837 + ... + 1659376.

Almost surely, 2^{1212121020010} is an apocalyptic number.

1212121020010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212121020010 is a deficient number, since it is larger than the sum of its proper divisors (969737990846).

1212121020010 is a wasteful number, since it uses less digits than its factorization.

1212121020010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2287497.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1212121020010 its reverse (100201212121), we get a palindrome (1312322232131).

The spelling of 1212121020010 in words is "one trillion, two hundred twelve billion, one hundred twenty-one million, twenty thousand, ten".