4072111621 has 4 divisors (see below), whose sum is σ = 4086500992. Its totient is φ = 4057722252.

The previous prime is 4072111583. The next prime is 4072111639. The reversal of 4072111621 is 1261112704.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4072111621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4072111651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7194261 + ... + 7194826.

It is an arithmetic number, because the mean of its divisors is an integer number (1021625248).

Almost surely, 2^4072111621 is an apocalyptic number.

It is an amenable number.

4072111621 is a deficient number, since it is larger than the sum of its proper divisors (14389371).

4072111621 is a wasteful number, since it uses less digits than its factorization.

4072111621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14389370.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 4072111621 is about 63813.0991333284. The cubic root of 4072111621 is about 1596.8834674413.

The spelling of 4072111621 in words is "four billion, seventy-two million, one hundred eleven thousand, six hundred twenty-one".