85121255029 has 2 divisors, whose sum is σ = 85121255030. Its totient is φ = 85121255028.

The previous prime is 85121255017. The next prime is 85121255041. The reversal of 85121255029 is 92055212158.

It is a balanced prime because it is at equal distance from previous prime (85121255017) and next prime (85121255041).

It can be written as a sum of positive squares in only one way, i.e., 51256054404 + 33865200625 = 226398^2 + 184025^2 .

It is a cyclic number.

It is not a de Polignac number, because 85121255029 - 2⁷ = 85121254901 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85121254982 and 85121255000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85121255099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42560627514 + 42560627515.

It is an arithmetic number, because the mean of its divisors is an integer number (42560627515).

Almost surely, 2^85121255029 is an apocalyptic number.

It is an amenable number.

85121255029 is a deficient number, since it is larger than the sum of its proper divisors (1).

85121255029 is an equidigital number, since it uses as much as digits as its factorization.

85121255029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72000, while the sum is 40.

The spelling of 85121255029 in words is "eighty-five billion, one hundred twenty-one million, two hundred fifty-five thousand, twenty-nine".