16216121011 has 2 divisors, whose sum is σ = 16216121012. Its totient is φ = 16216121010.

The previous prime is 16216121003. The next prime is 16216121029. The reversal of 16216121011 is 11012161261.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16216121011 - 2³ = 16216121003 is a prime.

It is not a weakly prime, because it can be changed into another prime (16216121711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8108060505 + 8108060506.

It is an arithmetic number, because the mean of its divisors is an integer number (8108060506).

Almost surely, 2^16216121011 is an apocalyptic number.

16216121011 is a deficient number, since it is larger than the sum of its proper divisors (1).

16216121011 is an equidigital number, since it uses as much as digits as its factorization.

16216121011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

Adding to 16216121011 its reverse (11012161261), we get a palindrome (27228282272).

The spelling of 16216121011 in words is "sixteen billion, two hundred sixteen million, one hundred twenty-one thousand, eleven".