22212121001001 has 4 divisors (see below), whose sum is σ = 29616161334672. Its totient is φ = 14808080667332.

The previous prime is 22212121000991. The next prime is 22212121001041. The reversal of 22212121001001 is 10010012121222.

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 22212121001001 - 2¹¹ = 22212120998953 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22212121001041) 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, 3702020166831 + ... + 3702020166836.

It is an arithmetic number, because the mean of its divisors is an integer number (7404040333668).

Almost surely, 2^{22212121001001} is an apocalyptic number.

It is an amenable number.

22212121001001 is a deficient number, since it is larger than the sum of its proper divisors (7404040333671).

22212121001001 is an equidigital number, since it uses as much as digits as its factorization.

22212121001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7404040333670.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 22212121001001 its reverse (10010012121222), we get a palindrome (32222133122223).

The spelling of 22212121001001 in words is "twenty-two trillion, two hundred twelve billion, one hundred twenty-one million, one thousand, one".