28333611121 has 2 divisors, whose sum is σ = 28333611122. Its totient is φ = 28333611120.

The previous prime is 28333611037. The next prime is 28333611143. The reversal of 28333611121 is 12111633382.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26639136225 + 1694474896 = 163215^2 + 41164^2 .

It is a cyclic number.

It is not a de Polignac number, because 28333611121 - 2⁷ = 28333610993 is a prime.

It is not a weakly prime, because it can be changed into another prime (28333611181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14166805560 + 14166805561.

It is an arithmetic number, because the mean of its divisors is an integer number (14166805561).

Almost surely, 2^28333611121 is an apocalyptic number.

It is an amenable number.

28333611121 is a deficient number, since it is larger than the sum of its proper divisors (1).

28333611121 is an equidigital number, since it uses as much as digits as its factorization.

28333611121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 31.

The spelling of 28333611121 in words is "twenty-eight billion, three hundred thirty-three million, six hundred eleven thousand, one hundred twenty-one".