2011430021 has 16 divisors (see below), whose sum is σ = 2144683008. Its totient is φ = 1879891200.

The previous prime is 2011430011. The next prime is 2011430039. The reversal of 2011430021 is 1200341102.

It is a cyclic number.

It is not a de Polignac number, because 2011430021 - 2⁶ = 2011429957 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2011429978 and 2011430005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011430011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1985111 + ... + 1986123.

It is an arithmetic number, because the mean of its divisors is an integer number (134042688).

Almost surely, 2^2011430021 is an apocalyptic number.

It is an amenable number.

2011430021 is a deficient number, since it is larger than the sum of its proper divisors (133252987).

2011430021 is a wasteful number, since it uses less digits than its factorization.

2011430021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1732.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2011430021 is about 44848.9690071020. The cubic root of 2011430021 is about 1262.3166460649.

Adding to 2011430021 its reverse (1200341102), we get a palindrome (3211771123).

The spelling of 2011430021 in words is "two billion, eleven million, four hundred thirty thousand, twenty-one".