222121011111001 has 8 divisors (see below), whose sum is σ = 222135330066944. Its totient is φ = 222106692677760.

The previous prime is 222121011110989. The next prime is 222121011111011. The reversal of 222121011111001 is 100111110121222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 222121011111001 - 2²³ = 222121002722393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222121011111011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1149699256 + ... + 1149892438.

It is an arithmetic number, because the mean of its divisors is an integer number (27766916258368).

Almost surely, 2^{222121011111001} is an apocalyptic number.

It is an amenable number.

222121011111001 is a deficient number, since it is larger than the sum of its proper divisors (14318955943).

222121011111001 is a wasteful number, since it uses less digits than its factorization.

222121011111001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261351.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 222121011111001 its reverse (100111110121222), we get a palindrome (322232121232223).

The spelling of 222121011111001 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, eleven million, one hundred eleven thousand, one".