2123221220111 has 16 divisors (see below), whose sum is σ = 2308319164800. Its totient is φ = 1946332590048.

The previous prime is 2123221220101. The next prime is 2123221220129. The reversal of 2123221220111 is 1110221223212.

It is a cyclic number.

It is not a de Polignac number, because 2123221220111 - 2¹⁰ = 2123221219087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123221220101) 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, 12056516 + ... + 12231353.

It is an arithmetic number, because the mean of its divisors is an integer number (144269947800).

Almost surely, 2^{2123221220111} is an apocalyptic number.

2123221220111 is a deficient number, since it is larger than the sum of its proper divisors (185097944689).

2123221220111 is a wasteful number, since it uses less digits than its factorization.

2123221220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24288038.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 2123221220111 its reverse (1110221223212), we get a palindrome (3233442443323).

The spelling of 2123221220111 in words is "two trillion, one hundred twenty-three billion, two hundred twenty-one million, two hundred twenty thousand, one hundred eleven".