2121444113211 has 8 divisors (see below), whose sum is σ = 3142880167760. Its totient is φ = 1414296075456.

The previous prime is 2121444113209. The next prime is 2121444113351. The reversal of 2121444113211 is 1123114441212.

2121444113211 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 4 + 441 + 1 + 3 + 211 = 666.

It is not a de Polignac number, because 2121444113211 - 2¹ = 2121444113209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 78572004193 = 2121444113211 / (2 + 1 + 2 + 1 + 4 + 4 + 4 + 1 + 1 + 3 + 2 + 1 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121444113611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39286002070 + ... + 39286002123.

It is an arithmetic number, because the mean of its divisors is an integer number (392860020970).

Almost surely, 2^{2121444113211} is an apocalyptic number.

2121444113211 is a deficient number, since it is larger than the sum of its proper divisors (1021436054549).

2121444113211 is an equidigital number, since it uses as much as digits as its factorization.

2121444113211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78572004202 (or 78572004196 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

Adding to 2121444113211 its reverse (1123114441212), we get a palindrome (3244558554423).

The spelling of 2121444113211 in words is "two trillion, one hundred twenty-one billion, four hundred forty-four million, one hundred thirteen thousand, two hundred eleven".