1001212111201 has 8 divisors (see below), whose sum is σ = 1021393425024. Its totient is φ = 981199679040.

The previous prime is 1001212111183. The next prime is 1001212111219. The reversal of 1001212111201 is 1021112121001.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1001212111183) and next prime (1001212111219).

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

It is a cyclic number.

It is not a de Polignac number, because 1001212111201 - 2¹⁹ = 1001211586913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001216111201) 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, 42208440 + ... + 42232153.

It is an arithmetic number, because the mean of its divisors is an integer number (127674178128).

Almost surely, 2^{1001212111201} is an apocalyptic number.

It is an amenable number.

1001212111201 is a deficient number, since it is larger than the sum of its proper divisors (20181313823).

1001212111201 is an equidigital number, since it uses as much as digits as its factorization.

1001212111201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84440831.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1001212111201 its reverse (1021112121001), we get a palindrome (2022324232202).

The spelling of 1001212111201 in words is "one trillion, one billion, two hundred twelve million, one hundred eleven thousand, two hundred one".