16421107 has 2 divisors, whose sum is σ = 16421108. Its totient is φ = 16421106.

The previous prime is 16421089. The next prime is 16421113. The reversal of 16421107 is 70112461.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16421107 is a prime.

It is not a weakly prime, because it can be changed into another prime (16421147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8210553 + 8210554.

It is an arithmetic number, because the mean of its divisors is an integer number (8210554).

Almost surely, 2^16421107 is an apocalyptic number.

16421107 is a deficient number, since it is larger than the sum of its proper divisors (1).

16421107 is an equidigital number, since it uses as much as digits as its factorization.

16421107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 16421107 is about 4052.2965093882. The cubic root of 16421107 is about 254.1757675263.

Adding to 16421107 its reverse (70112461), we get a palindrome (86533568).

The spelling of 16421107 in words is "sixteen million, four hundred twenty-one thousand, one hundred seven".