3011820021 has 12 divisors (see below), whose sum is σ = 4971893472. Its totient is φ = 1721039976.

The previous prime is 3011819999. The next prime is 3011820037. The reversal of 3011820021 is 1200281103.

It is not a de Polignac number, because 3011820021 - 2¹⁴ = 3011803637 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3011819976 and 3011820003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3011820041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23903271 + ... + 23903396.

It is an arithmetic number, because the mean of its divisors is an integer number (414324456).

Almost surely, 2^3011820021 is an apocalyptic number.

It is an amenable number.

3011820021 is a deficient number, since it is larger than the sum of its proper divisors (1960073451).

3011820021 is a wasteful number, since it uses less digits than its factorization.

3011820021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47806680 (or 47806677 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 3011820021 is about 54880.0512117108. The cubic root of 3011820021 is about 1444.1412458743.

The spelling of 3011820021 in words is "three billion, eleven million, eight hundred twenty thousand, twenty-one".