2141111281 has 2 divisors, whose sum is σ = 2141111282. Its totient is φ = 2141111280.

The previous prime is 2141111261. The next prime is 2141111303. The reversal of 2141111281 is 1821111412.

It is a happy number.

It is an a-pointer prime, because the next prime (2141111303) can be obtained adding 2141111281 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1830470656 + 310640625 = 42784^2 + 17625^2 .

It is a cyclic number.

It is not a de Polignac number, because 2141111281 - 2⁵ = 2141111249 is a prime.

It is a super-2 number, since 2×2141111281² = 9168715035250921922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2141111261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1070555640 + 1070555641.

It is an arithmetic number, because the mean of its divisors is an integer number (1070555641).

Almost surely, 2^2141111281 is an apocalyptic number.

It is an amenable number.

2141111281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2141111281 is an equidigital number, since it uses as much as digits as its factorization.

2141111281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 128, while the sum is 22.

The square root of 2141111281 is about 46272.1436827818. The cubic root of 2141111281 is about 1288.8817665549.

Adding to 2141111281 its reverse (1821111412), we get a palindrome (3962222693).

The spelling of 2141111281 in words is "two billion, one hundred forty-one million, one hundred eleven thousand, two hundred eighty-one".