4011121231 has 4 divisors (see below), whose sum is σ = 4319669032. Its totient is φ = 3702573432.

The previous prime is 4011121229. The next prime is 4011121241. The reversal of 4011121231 is 1321211104.

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 4011121231 - 2¹ = 4011121229 is a prime.

It is a super-2 number, since 2×4011121231² = 32178187059557910722, 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 (4011121241) 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, 154273881 + ... + 154273906.

It is an arithmetic number, because the mean of its divisors is an integer number (1079917258).

Almost surely, 2^4011121231 is an apocalyptic number.

4011121231 is a deficient number, since it is larger than the sum of its proper divisors (308547801).

4011121231 is a wasteful number, since it uses less digits than its factorization.

4011121231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308547800.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 4011121231 is about 63333.4132271426. The cubic root of 4011121231 is about 1588.8708451319.

Adding to 4011121231 its reverse (1321211104), we get a palindrome (5332332335).

The spelling of 4011121231 in words is "four billion, eleven million, one hundred twenty-one thousand, two hundred thirty-one".