1001212212122 has 8 divisors (see below), whose sum is σ = 1502347695156. Its totient is φ = 500429647072.

The previous prime is 1001212212097. The next prime is 1001212212167. The reversal of 1001212212122 is 2212122121001.

It can be written as a sum of positive squares in 2 ways, for example, as 898383604561 + 102828607561 = 947831^2 + 320669^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1001212212122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88222403 + ... + 88233750.

Almost surely, 2^{1001212212122} is an apocalyptic number.

1001212212122 is a deficient number, since it is larger than the sum of its proper divisors (501135483034).

1001212212122 is a wasteful number, since it uses less digits than its factorization.

1001212212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176458992.

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

Adding to 1001212212122 its reverse (2212122121001), we get a palindrome (3213334333123).

The spelling of 1001212212122 in words is "one trillion, one billion, two hundred twelve million, two hundred twelve thousand, one hundred twenty-two".