1012121110001 has 8 divisors (see below), whose sum is σ = 1031256814464. Its totient is φ = 992986853040.

The previous prime is 1012121109911. The next prime is 1012121110061. The reversal of 1012121110001 is 1000111212101.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012121110001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012121110061) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1105496 + ... + 1801766.

It is an arithmetic number, because the mean of its divisors is an integer number (128907101808).

Almost surely, 2^{1012121110001} is an apocalyptic number.

It is an amenable number.

1012121110001 is a deficient number, since it is larger than the sum of its proper divisors (19135704463).

1012121110001 is an equidigital number, since it uses as much as digits as its factorization.

1012121110001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723751.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1012121110001 its reverse (1000111212101), we get a palindrome (2012232322102).

The spelling of 1012121110001 in words is "one trillion, twelve billion, one hundred twenty-one million, one hundred ten thousand, one".