2111222121001 has 8 divisors (see below), whose sum is σ = 2446808736384. Its totient is φ = 1784131369440.

The previous prime is 2111222120999. The next prime is 2111222121049. The reversal of 2111222121001 is 1001212221112.

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

It is not a de Polignac number, because 2111222121001 - 2¹ = 2111222120999 is a prime.

It is a super-2 number, since 2×2111222121001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2111222121301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2123965420 + ... + 2123966413.

It is an arithmetic number, because the mean of its divisors is an integer number (305851092048).

Almost surely, 2^{2111222121001} is an apocalyptic number.

It is an amenable number.

2111222121001 is a deficient number, since it is larger than the sum of its proper divisors (335586615383).

2111222121001 is an equidigital number, since it uses as much as digits as its factorization.

2111222121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4247931911.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2111222121001 its reverse (1001212221112), we get a palindrome (3112434342113).

The spelling of 2111222121001 in words is "two trillion, one hundred eleven billion, two hundred twenty-two million, one hundred twenty-one thousand, one".