16120121021633 has 2 divisors, whose sum is σ = 16120121021634. Its totient is φ = 16120121021632.

The previous prime is 16120121021603. The next prime is 16120121021639. The reversal of 16120121021633 is 33612012102161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13308137473024 + 2811983548609 = 3648032^2 + 1676897^2 .

It is a cyclic number.

It is not a de Polignac number, because 16120121021633 - 2¹² = 16120121017537 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16120121021596 and 16120121021605.

It is not a weakly prime, because it can be changed into another prime (16120121021639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8060060510816 + 8060060510817.

It is an arithmetic number, because the mean of its divisors is an integer number (8060060510817).

Almost surely, 2^{16120121021633} is an apocalyptic number.

It is an amenable number.

16120121021633 is a deficient number, since it is larger than the sum of its proper divisors (1).

16120121021633 is an equidigital number, since it uses as much as digits as its factorization.

16120121021633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

Adding to 16120121021633 its reverse (33612012102161), we get a palindrome (49732133123794).

The spelling of 16120121021633 in words is "sixteen trillion, one hundred twenty billion, one hundred twenty-one million, twenty-one thousand, six hundred thirty-three".