16001221014 has 24 divisors (see below), whose sum is σ = 34767539352. Its totient is φ = 5318628480.

The previous prime is 16001220973. The next prime is 16001221091. The reversal of 16001221014 is 41012210061.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1252792 + ... + 1265499.

It is an arithmetic number, because the mean of its divisors is an integer number (1448647473).

Almost surely, 2^16001221014 is an apocalyptic number.

16001221014 is an abundant number, since it is smaller than the sum of its proper divisors (18766318338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16001221014 is a wasteful number, since it uses less digits than its factorization.

16001221014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2518652 (or 2518649 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 16001221014 its reverse (41012210061), we get a palindrome (57013431075).

The spelling of 16001221014 in words is "sixteen billion, one million, two hundred twenty-one thousand, fourteen".