12211126501 has 4 divisors (see below), whose sum is σ = 13955573152. Its totient is φ = 10466679852.

The previous prime is 12211126493. The next prime is 12211126507. The reversal of 12211126501 is 10562111221.

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 not a de Polignac number, because 12211126501 - 2³ = 12211126493 is a prime.

It is a super-2 number, since 2×12211126501² (a number of 21 digits) 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 (12211126507) 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, 872223315 + ... + 872223328.

It is an arithmetic number, because the mean of its divisors is an integer number (3488893288).

Almost surely, 2^12211126501 is an apocalyptic number.

It is an amenable number.

12211126501 is a deficient number, since it is larger than the sum of its proper divisors (1744446651).

12211126501 is an equidigital number, since it uses as much as digits as its factorization.

12211126501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744446650.

The product of its (nonzero) digits is 240, while the sum is 22.

Adding to 12211126501 its reverse (10562111221), we get a palindrome (22773237722).

The spelling of 12211126501 in words is "twelve billion, two hundred eleven million, one hundred twenty-six thousand, five hundred one".