2001031121 has 8 divisors (see below), whose sum is σ = 2187085824. Its totient is φ = 1822570560.

The previous prime is 2001031099. The next prime is 2001031133. The reversal of 2001031121 is 1211301002.

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 2001031121 - 2⁶ = 2001031057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001031321) 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, 1897985 + ... + 1899038.

It is an arithmetic number, because the mean of its divisors is an integer number (273385728).

Almost surely, 2^2001031121 is an apocalyptic number.

It is an amenable number.

2001031121 is a deficient number, since it is larger than the sum of its proper divisors (186054703).

2001031121 is a wasteful number, since it uses less digits than its factorization.

2001031121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3797071.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 2001031121 is about 44732.8863477420. The cubic root of 2001031121 is about 1260.1375345376.

Adding to 2001031121 its reverse (1211301002), we get a palindrome (3212332123).

The spelling of 2001031121 in words is "two billion, one million, thirty-one thousand, one hundred twenty-one".