990001022001 has 8 divisors (see below), whose sum is σ = 1342374267360. Its totient is φ = 648814228992.

The previous prime is 990001021981. The next prime is 990001022047. The reversal of 990001022001 is 100220100099.

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

It is not a de Polignac number, because 990001022001 - 2¹⁰ = 990001020977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (990001022081) 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, 2796612880 + ... + 2796613233.

It is an arithmetic number, because the mean of its divisors is an integer number (167796783420).

Almost surely, 2^990001022001 is an apocalyptic number.

It is an amenable number.

990001022001 is a deficient number, since it is larger than the sum of its proper divisors (352373245359).

990001022001 is a wasteful number, since it uses less digits than its factorization.

990001022001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5593226175.

The product of its (nonzero) digits is 324, while the sum is 24.

The spelling of 990001022001 in words is "nine hundred ninety billion, one million, twenty-two thousand, one".