2011001121 has 32 divisors (see below), whose sum is σ = 3022272000. Its totient is φ = 1321442640.

The previous prime is 2011001071. The next prime is 2011001131. The reversal of 2011001121 is 1211001102.

It is a happy number.

It is not a de Polignac number, because 2011001121 - 2¹⁰ = 2011000097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (2011001131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 607930 + ... + 611228.

It is an arithmetic number, because the mean of its divisors is an integer number (94446000).

Almost surely, 2^2011001121 is an apocalyptic number.

It is an amenable number.

2011001121 is a deficient number, since it is larger than the sum of its proper divisors (1011270879).

2011001121 is a wasteful number, since it uses less digits than its factorization.

2011001121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3626 (or 3620 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 2011001121 is about 44844.1871483919. The cubic root of 2011001121 is about 1262.2269178466.

Adding to 2011001121 its reverse (1211001102), we get a palindrome (3222002223).

The spelling of 2011001121 in words is "two billion, eleven million, one thousand, one hundred twenty-one".