2011010121 has 24 divisors (see below), whose sum is σ = 3080937600. Its totient is φ = 1259646336.

The previous prime is 2011010101. The next prime is 2011010123. The reversal of 2011010121 is 1210101102.

It is a happy number.

It is not a de Polignac number, because 2011010121 - 2⁷ = 2011009993 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 (2011010123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80676 + ... + 102618.

It is an arithmetic number, because the mean of its divisors is an integer number (128372400).

Almost surely, 2^2011010121 is an apocalyptic number.

It is an amenable number.

2011010121 is a deficient number, since it is larger than the sum of its proper divisors (1069927479).

2011010121 is a wasteful number, since it uses less digits than its factorization.

2011010121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22565 (or 22562 counting only the distinct ones).

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

The square root of 2011010121 is about 44844.2874957335. The cubic root of 2011010121 is about 1262.2288008267.

Adding to 2011010121 its reverse (1210101102), we get a palindrome (3221111223).

The spelling of 2011010121 in words is "two billion, eleven million, ten thousand, one hundred twenty-one".