16021032023021 has 16 divisors (see below), whose sum is σ = 17003335246128. Its totient is φ = 15043172889600.

The previous prime is 16021032022999. The next prime is 16021032023071. The reversal of 16021032023021 is 12032023012061.

16021032023021 = 2830285² + 2830286².

It can be written as a sum of positive squares in 8 ways, for example, as 570197152996 + 15450834870025 = 755114^2 + 3930755^2 .

It is a cyclic number.

It is not a de Polignac number, because 16021032023021 - 2³⁴ = 16003852153837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16021032023071) 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, 43555151 + ... + 43921443.

It is an arithmetic number, because the mean of its divisors is an integer number (1062708452883).

Almost surely, 2^{16021032023021} is an apocalyptic number.

16021032023021 is the 2830286-th centered square number.

It is an amenable number.

16021032023021 is a deficient number, since it is larger than the sum of its proper divisors (982303223107).

16021032023021 is a wasteful number, since it uses less digits than its factorization.

16021032023021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372352.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 16021032023021 its reverse (12032023012061), we get a palindrome (28053055035082).

The spelling of 16021032023021 in words is "sixteen trillion, twenty-one billion, thirty-two million, twenty-three thousand, twenty-one".