1000121122001 has 4 divisors (see below), whose sum is σ = 1000127871600. Its totient is φ = 1000114372404.

The previous prime is 1000121121983. The next prime is 1000121122009. The reversal of 1000121122001 is 1002211210001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1000121122001 - 2²⁶ = 1000054013137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1000121122009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3147431 + ... + 3450588.

It is an arithmetic number, because the mean of its divisors is an integer number (250031967900).

Almost surely, 2^{1000121122001} is an apocalyptic number.

It is an amenable number.

1000121122001 is a deficient number, since it is larger than the sum of its proper divisors (6749599).

1000121122001 is an equidigital number, since it uses as much as digits as its factorization.

1000121122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6749598.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1000121122001 its reverse (1002211210001), we get a palindrome (2002332332002).

The spelling of 1000121122001 in words is "one trillion, one hundred twenty-one million, one hundred twenty-two thousand, one".