2011030021 has 24 divisors (see below), whose sum is σ = 2748350304. Its totient is φ = 1446490080.

The previous prime is 2011030019. The next prime is 2011030037. The reversal of 2011030021 is 1200301102.

It is not a de Polignac number, because 2011030021 - 2¹ = 2011030019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011030051) 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, 136495 + ... + 150508.

It is an arithmetic number, because the mean of its divisors is an integer number (114514596).

Almost surely, 2^2011030021 is an apocalyptic number.

It is an amenable number.

2011030021 is a deficient number, since it is larger than the sum of its proper divisors (737320283).

2011030021 is a wasteful number, since it uses less digits than its factorization.

2011030021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287041 (or 287034 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 2011030021 is about 44844.5093740583. The cubic root of 2011030021 is about 1262.2329642850.

Adding to 2011030021 its reverse (1200301102), we get a palindrome (3211331123).

The spelling of 2011030021 in words is "two billion, eleven million, thirty thousand, twenty-one".