2142220740281 has 2 divisors, whose sum is σ = 2142220740282. Its totient is φ = 2142220740280.

The previous prime is 2142220740263. The next prime is 2142220740337. The reversal of 2142220740281 is 1820470222412.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1794956857600 + 347263882681 = 1339760^2 + 589291^2 .

It is a cyclic number.

It is not a de Polignac number, because 2142220740281 - 2¹⁴ = 2142220723897 is a prime.

It is a super-2 number, since 2×2142220740281² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2142220742281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071110370140 + 1071110370141.

It is an arithmetic number, because the mean of its divisors is an integer number (1071110370141).

Almost surely, 2^{2142220740281} is an apocalyptic number.

It is an amenable number.

2142220740281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2142220740281 is an equidigital number, since it uses as much as digits as its factorization.

2142220740281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28672, while the sum is 35.

Adding to 2142220740281 its reverse (1820470222412), we get a palindrome (3962690962693).

The spelling of 2142220740281 in words is "two trillion, one hundred forty-two billion, two hundred twenty million, seven hundred forty thousand, two hundred eighty-one".