1850212249129 has 2 divisors, whose sum is σ = 1850212249130. Its totient is φ = 1850212249128.

The previous prime is 1850212249097. The next prime is 1850212249177. The reversal of 1850212249129 is 9219422120581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1707817717225 + 142394531904 = 1306835^2 + 377352^2 .

It is a cyclic number.

It is not a de Polignac number, because 1850212249129 - 2⁵ = 1850212249097 is a prime.

It is a super-2 number, since 2×1850212249129² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1850212249229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 925106124564 + 925106124565.

It is an arithmetic number, because the mean of its divisors is an integer number (925106124565).

Almost surely, 2^{1850212249129} is an apocalyptic number.

It is an amenable number.

1850212249129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1850212249129 is an equidigital number, since it uses as much as digits as its factorization.

1850212249129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 46.

The spelling of 1850212249129 in words is "one trillion, eight hundred fifty billion, two hundred twelve million, two hundred forty-nine thousand, one hundred twenty-nine".