1001001202121 has 8 divisors (see below), whose sum is σ = 1003078365120. Its totient is φ = 998926061872.

The previous prime is 1001001202093. The next prime is 1001001202139. The reversal of 1001001202121 is 1212021001001.

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 1001001202121 - 2³⁰ = 999927460297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001001202141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 487100 + ... + 1496418.

It is an arithmetic number, because the mean of its divisors is an integer number (125384795640).

Almost surely, 2^{1001001202121} is an apocalyptic number.

It is an amenable number.

1001001202121 is a deficient number, since it is larger than the sum of its proper divisors (2077162999).

1001001202121 is a wasteful number, since it uses less digits than its factorization.

1001001202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011375.

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

Adding to 1001001202121 its reverse (1212021001001), we get a palindrome (2213022203122).

The spelling of 1001001202121 in words is "one trillion, one billion, one million, two hundred two thousand, one hundred twenty-one".