23111222151 has 8 divisors (see below), whose sum is σ = 30886130800. Its totient is φ = 15371897472.

The previous prime is 23111222137. The next prime is 23111222153. The reversal of 23111222151 is 15122211132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23111222151 - 2⁵ = 23111222119 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 (23111222153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8894476 + ... + 8897073.

It is an arithmetic number, because the mean of its divisors is an integer number (3860766350).

Almost surely, 2^23111222151 is an apocalyptic number.

23111222151 is a deficient number, since it is larger than the sum of its proper divisors (7774908649).

23111222151 is a wasteful number, since it uses less digits than its factorization.

23111222151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17791985.

The product of its digits is 240, while the sum is 21.

Adding to 23111222151 its reverse (15122211132), we get a palindrome (38233433283).

The spelling of 23111222151 in words is "twenty-three billion, one hundred eleven million, two hundred twenty-two thousand, one hundred fifty-one".