2121223141 has 2 divisors, whose sum is σ = 2121223142. Its totient is φ = 2121223140.

The previous prime is 2121223121. The next prime is 2121223163. The reversal of 2121223141 is 1413221212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1449324900 + 671898241 = 38070^2 + 25921^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121223141 - 2⁹ = 2121222629 is a prime.

It is a super-2 number, since 2×2121223141² = 8999175227827811762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121223121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060611570 + 1060611571.

It is an arithmetic number, because the mean of its divisors is an integer number (1060611571).

Almost surely, 2^2121223141 is an apocalyptic number.

It is an amenable number.

2121223141 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121223141 is an equidigital number, since it uses as much as digits as its factorization.

2121223141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192, while the sum is 19.

The square root of 2121223141 is about 46056.7382800823. The cubic root of 2121223141 is about 1284.8786677064.

Adding to 2121223141 its reverse (1413221212), we get a palindrome (3534444353).

The spelling of 2121223141 in words is "two billion, one hundred twenty-one million, two hundred twenty-three thousand, one hundred forty-one".