4011000021 has 48 divisors (see below), whose sum is σ = 6678630400. Its totient is φ = 2272263840.

The previous prime is 4011000013. The next prime is 4011000023. The reversal of 4011000021 is 1200001104.

It is a happy number.

It is not a de Polignac number, because 4011000021 - 2³ = 4011000013 is a prime.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4010999967 and 4011000012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4011000023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5804286 + ... + 5804976.

Almost surely, 2^4011000021 is an apocalyptic number.

It is an amenable number.

4011000021 is a deficient number, since it is larger than the sum of its proper divisors (2667630379).

4011000021 is a wasteful number, since it uses less digits than its factorization.

4011000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1366 (or 1363 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 4011000021 is about 63332.4563000678. The cubic root of 4011000021 is about 1588.8548405483.

Adding to 4011000021 its reverse (1200001104), we get a palindrome (5211001125).

The spelling of 4011000021 in words is "four billion, eleven million, twenty-one", and thus it is an aban number.