16018446121 has 2 divisors, whose sum is σ = 16018446122. Its totient is φ = 16018446120.

The previous prime is 16018446091. The next prime is 16018446151. The reversal of 16018446121 is 12164481061.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (16018446091) and next prime (16018446151).

It can be written as a sum of positive squares in only one way, i.e., 16018446096 + 25 = 126564^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 16018446121 - 2²¹ = 16016348969 is a prime.

It is a super-2 number, since 2×16018446121² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16018446151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8009223060 + 8009223061.

It is an arithmetic number, because the mean of its divisors is an integer number (8009223061).

Almost surely, 2^16018446121 is an apocalyptic number.

It is an amenable number.

16018446121 is a deficient number, since it is larger than the sum of its proper divisors (1).

16018446121 is an equidigital number, since it uses as much as digits as its factorization.

16018446121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 34.

The spelling of 16018446121 in words is "sixteen billion, eighteen million, four hundred forty-six thousand, one hundred twenty-one".