11111904281 has 2 divisors, whose sum is σ = 11111904282. Its totient is φ = 11111904280.

The previous prime is 11111904257. The next prime is 11111904301. The reversal of 11111904281 is 18240911111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9685709056 + 1426195225 = 98416^2 + 37765^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111904281 - 2¹⁸ = 11111642137 is a prime.

It is a super-2 number, since 2×11111904281² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11111904481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555952140 + 5555952141.

It is an arithmetic number, because the mean of its divisors is an integer number (5555952141).

Almost surely, 2^11111904281 is an apocalyptic number.

It is an amenable number.

11111904281 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111904281 is an equidigital number, since it uses as much as digits as its factorization.

11111904281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 29.

The spelling of 11111904281 in words is "eleven billion, one hundred eleven million, nine hundred four thousand, two hundred eighty-one".