22120010001 has 24 divisors (see below), whose sum is σ = 32447198784. Its totient is φ = 14517977760.

The previous prime is 22120009943. The next prime is 22120010023. The reversal of 22120010001 is 10001002122.

It is not a de Polignac number, because 22120010001 - 2¹⁷ = 22119878929 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22120010051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1103811 + ... + 1123671.

It is an arithmetic number, because the mean of its divisors is an integer number (1351966616).

Almost surely, 2^22120010001 is an apocalyptic number.

It is an amenable number.

22120010001 is a deficient number, since it is larger than the sum of its proper divisors (10327188783).

22120010001 is a wasteful number, since it uses less digits than its factorization.

22120010001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21781 (or 21778 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 22120010001 its reverse (10001002122), we get a palindrome (32121012123).

The spelling of 22120010001 in words is "twenty-two billion, one hundred twenty million, ten thousand, one".