211203210021 has 8 divisors (see below), whose sum is σ = 281943974880. Its totient is φ = 140632292592.

The previous prime is 211203209983. The next prime is 211203210047. The reversal of 211203210021 is 120012302112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 211203210021 - 2⁹ = 211203209509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211203212021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42458955 + ... + 42463928.

It is an arithmetic number, because the mean of its divisors is an integer number (35242996860).

Almost surely, 2^211203210021 is an apocalyptic number.

It is an amenable number.

211203210021 is a deficient number, since it is larger than the sum of its proper divisors (70740764859).

211203210021 is an equidigital number, since it uses as much as digits as its factorization.

211203210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84923715.

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

Adding to 211203210021 its reverse (120012302112), we get a palindrome (331215512133).

The spelling of 211203210021 in words is "two hundred eleven billion, two hundred three million, two hundred ten thousand, twenty-one".