88685665121 has 2 divisors, whose sum is σ = 88685665122. Its totient is φ = 88685665120.

The previous prime is 88685665051. The next prime is 88685665139. The reversal of 88685665121 is 12156658688.

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., 46111120225 + 42574544896 = 214735^2 + 206336^2 .

It is a cyclic number.

It is not a de Polignac number, because 88685665121 - 2³⁰ = 87611923297 is a prime.

It is a super-4 number, since 4×88685665121⁴ (a number of 45 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (88685665141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44342832560 + 44342832561.

It is an arithmetic number, because the mean of its divisors is an integer number (44342832561).

Almost surely, 2^88685665121 is an apocalyptic number.

It is an amenable number.

88685665121 is a deficient number, since it is larger than the sum of its proper divisors (1).

88685665121 is an equidigital number, since it uses as much as digits as its factorization.

88685665121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5529600, while the sum is 56.

The spelling of 88685665121 in words is "eighty-eight billion, six hundred eighty-five million, six hundred sixty-five thousand, one hundred twenty-one".