21003223019999 has 16 divisors (see below), whose sum is σ = 23290752428160. Its totient is φ = 18779604291360.

The previous prime is 21003223019983. The next prime is 21003223020001. The reversal of 21003223019999 is 99991032230012.

It is a happy number.

It is not a de Polignac number, because 21003223019999 - 2⁴ = 21003223019983 is a prime.

It is a super-2 number, since 2×21003223019999² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003223013999) 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, 21686504 + ... + 22634285.

It is an arithmetic number, because the mean of its divisors is an integer number (1455672026760).

Almost surely, 2^{21003223019999} is an apocalyptic number.

21003223019999 is a deficient number, since it is larger than the sum of its proper divisors (2287529408161).

21003223019999 is a wasteful number, since it uses less digits than its factorization.

21003223019999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44321510.

The product of its (nonzero) digits is 472392, while the sum is 50.

The spelling of 21003223019999 in words is "twenty-one trillion, three billion, two hundred twenty-three million, nineteen thousand, nine hundred ninety-nine".