21200121012003 has 16 divisors (see below), whose sum is σ = 29757964425600. Its totient is φ = 13388016234240.

The previous prime is 21200121012001. The next prime is 21200121012047. The reversal of 21200121012003 is 30021012100212.

It is not a de Polignac number, because 21200121012003 - 2¹ = 21200121012001 is a prime.

It is a super-2 number, since 2×21200121012003² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21200121012001) 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, 20801838 + ... + 21797171.

It is an arithmetic number, because the mean of its divisors is an integer number (1859872776600).

Almost surely, 2^{21200121012003} is an apocalyptic number.

21200121012003 is a deficient number, since it is larger than the sum of its proper divisors (8557843413597).

21200121012003 is a wasteful number, since it uses less digits than its factorization.

21200121012003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42607762.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21200121012003 its reverse (30021012100212), we get a palindrome (51221133112215).

The spelling of 21200121012003 in words is "twenty-one trillion, two hundred billion, one hundred twenty-one million, twelve thousand, three".