75212155129 has 2 divisors, whose sum is σ = 75212155130. Its totient is φ = 75212155128.

The previous prime is 75212155111. The next prime is 75212155181. The reversal of 75212155129 is 92155121257.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74951655529 + 260499600 = 273773^2 + 16140^2 .

It is a cyclic number.

It is not a de Polignac number, because 75212155129 - 2¹³ = 75212146937 is a prime.

It is a super-2 number, since 2×75212155129² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 75212155091 and 75212155100.

It is not a weakly prime, because it can be changed into another prime (75212150129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37606077564 + 37606077565.

It is an arithmetic number, because the mean of its divisors is an integer number (37606077565).

Almost surely, 2^75212155129 is an apocalyptic number.

It is an amenable number.

75212155129 is a deficient number, since it is larger than the sum of its proper divisors (1).

75212155129 is an equidigital number, since it uses as much as digits as its factorization.

75212155129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63000, while the sum is 40.

The spelling of 75212155129 in words is "seventy-five billion, two hundred twelve million, one hundred fifty-five thousand, one hundred twenty-nine".