21121020201003 has 16 divisors (see below), whose sum is σ = 28465917312000. Its totient is φ = 13928546854656.

The previous prime is 21121020200981. The next prime is 21121020201053. The reversal of 21121020201003 is 30010202012112.

It is not a de Polignac number, because 21121020201003 - 2⁵ = 21121020200971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21121020201053) 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, 17572575 + ... + 18735992.

It is an arithmetic number, because the mean of its divisors is an integer number (1779119832000).

Almost surely, 2^{21121020201003} is an apocalyptic number.

21121020201003 is a deficient number, since it is larger than the sum of its proper divisors (7344897110997).

21121020201003 is a wasteful number, since it uses less digits than its factorization.

21121020201003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36310666.

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

Adding to 21121020201003 its reverse (30010202012112), we get a palindrome (51131222213115).

The spelling of 21121020201003 in words is "twenty-one trillion, one hundred twenty-one billion, twenty million, two hundred one thousand, three".