16121612237 has 2 divisors, whose sum is σ = 16121612238. Its totient is φ = 16121612236.

The previous prime is 16121612209. The next prime is 16121612321. The reversal of 16121612237 is 73221612161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15958258276 + 163353961 = 126326^2 + 12781^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16121612237 is a prime.

It is a super-2 number, since 2×16121612237² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16121512237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8060806118 + 8060806119.

It is an arithmetic number, because the mean of its divisors is an integer number (8060806119).

Almost surely, 2^16121612237 is an apocalyptic number.

It is an amenable number.

16121612237 is a deficient number, since it is larger than the sum of its proper divisors (1).

16121612237 is an equidigital number, since it uses as much as digits as its factorization.

16121612237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The spelling of 16121612237 in words is "sixteen billion, one hundred twenty-one million, six hundred twelve thousand, two hundred thirty-seven".