16427579326121 has 2 divisors, whose sum is σ = 16427579326122. Its totient is φ = 16427579326120.

The previous prime is 16427579326079. The next prime is 16427579326181. The reversal of 16427579326121 is 12162397572461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14589833072896 + 1837746253225 = 3819664^2 + 1355635^2 .

It is a cyclic number.

It is not a de Polignac number, because 16427579326121 - 2²² = 16427575131817 is a prime.

It is not a weakly prime, because it can be changed into another prime (16427579326181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8213789663060 + 8213789663061.

It is an arithmetic number, because the mean of its divisors is an integer number (8213789663061).

Almost surely, 2^{16427579326121} is an apocalyptic number.

It is an amenable number.

16427579326121 is a deficient number, since it is larger than the sum of its proper divisors (1).

16427579326121 is an equidigital number, since it uses as much as digits as its factorization.

16427579326121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7620480, while the sum is 56.

The spelling of 16427579326121 in words is "sixteen trillion, four hundred twenty-seven billion, five hundred seventy-nine million, three hundred twenty-six thousand, one hundred twenty-one".