211203031030021 has 32 divisors (see below), whose sum is σ = 220255416235008. Its totient is φ = 202376309815680.

The previous prime is 211203031030003. The next prime is 211203031030063. The reversal of 211203031030021 is 120030130302112.

It is not a de Polignac number, because 211203031030021 - 2²⁷ = 211202896812293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211203031030421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 578555865 + ... + 578920801.

It is an arithmetic number, because the mean of its divisors is an integer number (6882981757344).

Almost surely, 2^{211203031030021} is an apocalyptic number.

It is an amenable number.

211203031030021 is a deficient number, since it is larger than the sum of its proper divisors (9052385204987).

211203031030021 is a wasteful number, since it uses less digits than its factorization.

211203031030021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366201.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 211203031030021 its reverse (120030130302112), we get a palindrome (331233161332133).

The spelling of 211203031030021 in words is "two hundred eleven trillion, two hundred three billion, thirty-one million, thirty thousand, twenty-one".