16312121322149 has 2 divisors, whose sum is σ = 16312121322150. Its totient is φ = 16312121322148.

The previous prime is 16312121322143. The next prime is 16312121322187. The reversal of 16312121322149 is 94122312121361.

It is an a-pointer prime, because the next prime (16312121322187) can be obtained adding 16312121322149 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16310233419649 + 1887902500 = 4038593^2 + 43450^2 .

It is a cyclic number.

It is not a de Polignac number, because 16312121322149 - 2²⁰ = 16312120273573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16312121322143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8156060661074 + 8156060661075.

It is an arithmetic number, because the mean of its divisors is an integer number (8156060661075).

Almost surely, 2^{16312121322149} is an apocalyptic number.

It is an amenable number.

16312121322149 is a deficient number, since it is larger than the sum of its proper divisors (1).

16312121322149 is an equidigital number, since it uses as much as digits as its factorization.

16312121322149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The spelling of 16312121322149 in words is "sixteen trillion, three hundred twelve billion, one hundred twenty-one million, three hundred twenty-two thousand, one hundred forty-nine".