4021345511 has 4 divisors (see below), whose sum is σ = 4028779224. Its totient is φ = 4013911800.

The previous prime is 4021345487. The next prime is 4021345543. The reversal of 4021345511 is 1155431204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4021345511 - 2²² = 4017151207 is a prime.

It is a super-2 number, since 2×4021345511² = 32342439437679702242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021345571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3716045 + ... + 3717126.

It is an arithmetic number, because the mean of its divisors is an integer number (1007194806).

Almost surely, 2^4021345511 is an apocalyptic number.

4021345511 is a deficient number, since it is larger than the sum of its proper divisors (7433713).

4021345511 is an equidigital number, since it uses as much as digits as its factorization.

4021345511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7433712.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 4021345511 is about 63414.0797536320. The cubic root of 4021345511 is about 1590.2197013235.

Adding to 4021345511 its reverse (1155431204), we get a palindrome (5176776715).

The spelling of 4021345511 in words is "four billion, twenty-one million, three hundred forty-five thousand, five hundred eleven".