2221230112121 has 2 divisors, whose sum is σ = 2221230112122. Its totient is φ = 2221230112120.

The previous prime is 2221230112103. The next prime is 2221230112139. The reversal of 2221230112121 is 1212110321222.

2221230112121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (2221230112103) and next prime (2221230112139).

It can be written as a sum of positive squares in only one way, i.e., 2219918223721 + 1311888400 = 1489939^2 + 36220^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221230112121 - 2¹⁰ = 2221230111097 is a prime.

It is a super-2 number, since 2×2221230112121² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2221230112093 and 2221230112102.

It is not a weakly prime, because it can be changed into another prime (2221230112181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110615056060 + 1110615056061.

It is an arithmetic number, because the mean of its divisors is an integer number (1110615056061).

Almost surely, 2^{2221230112121} is an apocalyptic number.

It is an amenable number.

2221230112121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221230112121 is an equidigital number, since it uses as much as digits as its factorization.

2221230112121 is an odious number, because the sum of its binary digits is odd.

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

Adding to 2221230112121 its reverse (1212110321222), we get a palindrome (3433340433343).

The spelling of 2221230112121 in words is "two trillion, two hundred twenty-one billion, two hundred thirty million, one hundred twelve thousand, one hundred twenty-one".