2111412012221 has 2 divisors, whose sum is σ = 2111412012222. Its totient is φ = 2111412012220.

The previous prime is 2111412012137. The next prime is 2111412012239. The reversal of 2111412012221 is 1222102141112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2049106360900 + 62305651321 = 1431470^2 + 249611^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2111412012221 is a prime.

It is a super-2 number, since 2×2111412012221² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2111412012193 and 2111412012202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111412012271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055706006110 + 1055706006111.

It is an arithmetic number, because the mean of its divisors is an integer number (1055706006111).

Almost surely, 2^{2111412012221} is an apocalyptic number.

It is an amenable number.

2111412012221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111412012221 is an equidigital number, since it uses as much as digits as its factorization.

2111412012221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 2111412012221 its reverse (1222102141112), we get a palindrome (3333514153333).

The spelling of 2111412012221 in words is "two trillion, one hundred eleven billion, four hundred twelve million, twelve thousand, two hundred twenty-one".