123211351154149 has 2 divisors, whose sum is σ = 123211351154150. Its totient is φ = 123211351154148.

The previous prime is 123211351154051. The next prime is 123211351154209. The reversal of 123211351154149 is 941451153112321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64009760372100 + 59201590782049 = 8000610^2 + 7694257^2 .

It is a cyclic number.

It is not a de Polignac number, because 123211351154149 - 2¹¹ = 123211351152101 is a prime.

It is a super-2 number, since 2×123211351154149² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123211351154849) 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, 61605675577074 + 61605675577075.

It is an arithmetic number, because the mean of its divisors is an integer number (61605675577075).

Almost surely, 2^{123211351154149} is an apocalyptic number.

It is an amenable number.

123211351154149 is a deficient number, since it is larger than the sum of its proper divisors (1).

123211351154149 is an equidigital number, since it uses as much as digits as its factorization.

123211351154149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 43.

The spelling of 123211351154149 in words is "one hundred twenty-three trillion, two hundred eleven billion, three hundred fifty-one million, one hundred fifty-four thousand, one hundred forty-nine".