22122212121001 has 16 divisors (see below), whose sum is σ = 23504433107904. Its totient is φ = 20749050146304.

The previous prime is 22122212120999. The next prime is 22122212121101. The reversal of 22122212121001 is 10012121222122.

It is a cyclic number.

It is not a de Polignac number, because 22122212121001 - 2¹ = 22122212120999 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 22122212121001.

It is not an unprimeable number, because it can be changed into a prime (22122212121101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9271306 + ... + 11410588.

It is an arithmetic number, because the mean of its divisors is an integer number (1469027069244).

Almost surely, 2^{22122212121001} is an apocalyptic number.

It is an amenable number.

22122212121001 is a deficient number, since it is larger than the sum of its proper divisors (1382220986903).

22122212121001 is a wasteful number, since it uses less digits than its factorization.

22122212121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2141400.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 22122212121001 its reverse (10012121222122), we get a palindrome (32134333343123).

It can be divided in two parts, 221 and 22212121001, that added together give a palindrome (22212121222).

The spelling of 22122212121001 in words is "twenty-two trillion, one hundred twenty-two billion, two hundred twelve million, one hundred twenty-one thousand, one".