21003223020000 has 240 divisors, whose sum is σ = 74194372763280. Its totient is φ = 5170023936000.

The previous prime is 21003223019983. The next prime is 21003223020001. The reversal of 21003223020000 is 2032230012.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×21003223020000² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003223020001) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 12683605 + ... + 14243604.

It is an arithmetic number, because the mean of its divisors is an integer number (309143219847).

Almost surely, 2^{21003223020000} is an apocalyptic number.

21003223020000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21003223020000 is an abundant number, since it is smaller than the sum of its proper divisors (53191149743280).

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

21003223020000 is a wasteful number, since it uses less digits than its factorization.

21003223020000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26927255 (or 26927232 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 21003223020000 its reverse (2032230012), we get a palindrome (21005255250012).

The spelling of 21003223020000 in words is "twenty-one trillion, three billion, two hundred twenty-three million, twenty thousand".