16401212223 has 16 divisors (see below), whose sum is σ = 24067431936. Its totient is φ = 9852160640.

The previous prime is 16401212171. The next prime is 16401212227. The reversal of 16401212223 is 32221210461.

It is a cyclic number.

It is not a de Polignac number, because 16401212223 - 2⁶ = 16401212159 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16401212193 and 16401212202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16401212227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2195415 + ... + 2202872.

It is an arithmetic number, because the mean of its divisors is an integer number (1504214496).

Almost surely, 2^16401212223 is an apocalyptic number.

16401212223 is a deficient number, since it is larger than the sum of its proper divisors (7666219713).

16401212223 is a wasteful number, since it uses less digits than its factorization.

16401212223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4398414.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 16401212223 its reverse (32221210461), we get a palindrome (48622422684).

The spelling of 16401212223 in words is "sixteen billion, four hundred one million, two hundred twelve thousand, two hundred twenty-three".