4121167621 has 16 divisors (see below), whose sum is σ = 4485775360. Its totient is φ = 3771768240.

The previous prime is 4121167619. The next prime is 4121167627. The reversal of 4121167621 is 1267611214.

It is a cyclic number.

It is not a de Polignac number, because 4121167621 - 2¹ = 4121167619 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4121167627) 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, 351760 + ... + 363286.

It is an arithmetic number, because the mean of its divisors is an integer number (280360960).

Almost surely, 2^4121167621 is an apocalyptic number.

It is an amenable number.

4121167621 is a deficient number, since it is larger than the sum of its proper divisors (364607739).

4121167621 is a wasteful number, since it uses less digits than its factorization.

4121167621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12184.

The product of its digits is 4032, while the sum is 31.

The square root of 4121167621 is about 64196.3209304085. The cubic root of 4121167621 is about 1603.2703449575.

Adding to 4121167621 its reverse (1267611214), we get a palindrome (5388778835).

The spelling of 4121167621 in words is "four billion, one hundred twenty-one million, one hundred sixty-seven thousand, six hundred twenty-one".