22501232251111 has 4 divisors (see below), whose sum is σ = 22631297177592. Its totient is φ = 22371167324632.

The previous prime is 22501232251097. The next prime is 22501232251129. The reversal of 22501232251111 is 11115223210522.

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 22501232251111 - 2⁷ = 22501232250983 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22501232251111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22501232231111) 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, 65032462981 + ... + 65032463326.

It is an arithmetic number, because the mean of its divisors is an integer number (5657824294398).

Almost surely, 2^{22501232251111} is an apocalyptic number.

22501232251111 is a deficient number, since it is larger than the sum of its proper divisors (130064926481).

22501232251111 is a wasteful number, since it uses less digits than its factorization.

22501232251111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130064926480.

The product of its (nonzero) digits is 2400, while the sum is 28.

Adding to 22501232251111 its reverse (11115223210522), we get a palindrome (33616455461633).

The spelling of 22501232251111 in words is "twenty-two trillion, five hundred one billion, two hundred thirty-two million, two hundred fifty-one thousand, one hundred eleven".