16121620106 has 4 divisors (see below), whose sum is σ = 24182430162. Its totient is φ = 8060810052.

The previous prime is 16121620051. The next prime is 16121620147. The reversal of 16121620106 is 60102612161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13557109225 + 2564510881 = 116435^2 + 50641^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4030405025 + ... + 4030405028.

Almost surely, 2^16121620106 is an apocalyptic number.

16121620106 is a deficient number, since it is larger than the sum of its proper divisors (8060810056).

16121620106 is an equidigital number, since it uses as much as digits as its factorization.

16121620106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8060810055.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 16121620106 in words is "sixteen billion, one hundred twenty-one million, six hundred twenty thousand, one hundred six".