16121177222 has 4 divisors (see below), whose sum is σ = 24181765836. Its totient is φ = 8060588610.

The previous prime is 16121177207. The next prime is 16121177249. The reversal of 16121177222 is 22277112161.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4030294304 + ... + 4030294307.

It is an arithmetic number, because the mean of its divisors is an integer number (6045441459).

Almost surely, 2^16121177222 is an apocalyptic number.

16121177222 is a deficient number, since it is larger than the sum of its proper divisors (8060588614).

16121177222 is an equidigital number, since it uses as much as digits as its factorization.

16121177222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8060588613.

The product of its digits is 4704, while the sum is 32.

Adding to 16121177222 its reverse (22277112161), we get a palindrome (38398289383).

The spelling of 16121177222 in words is "sixteen billion, one hundred twenty-one million, one hundred seventy-seven thousand, two hundred twenty-two".