1001212122122 has 4 divisors (see below), whose sum is σ = 1501818183186. Its totient is φ = 500606061060.

The previous prime is 1001212122107. The next prime is 1001212122133. The reversal of 1001212122122 is 2212212121001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 894785456761 + 106426665361 = 945931^2 + 326231^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1001212122122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250303030529 + ... + 250303030532.

Almost surely, 2^{1001212122122} is an apocalyptic number.

1001212122122 is a deficient number, since it is larger than the sum of its proper divisors (500606061064).

1001212122122 is an equidigital number, since it uses as much as digits as its factorization.

1001212122122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500606061063.

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

Adding to 1001212122122 its reverse (2212212121001), we get a palindrome (3213424243123).

The spelling of 1001212122122 in words is "one trillion, one billion, two hundred twelve million, one hundred twenty-two thousand, one hundred twenty-two".