22121111001 has 32 divisors (see below), whose sum is σ = 32860287360. Its totient is φ = 13124672000.

The previous prime is 22121110993. The next prime is 22121111003. The reversal of 22121111001 is 10011112122.

It is not a de Polignac number, because 22121111001 - 2³ = 22121110993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22121111003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 259351 + ... + 333923.

It is an arithmetic number, because the mean of its divisors is an integer number (1026883980).

Almost surely, 2^22121111001 is an apocalyptic number.

It is an amenable number.

22121111001 is a deficient number, since it is larger than the sum of its proper divisors (10739176359).

22121111001 is a wasteful number, since it uses less digits than its factorization.

22121111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74777.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 22121111001 its reverse (10011112122), we get a palindrome (32132223123).

The spelling of 22121111001 in words is "twenty-two billion, one hundred twenty-one million, one hundred eleven thousand, one".