211421030421 has 8 divisors (see below), whose sum is σ = 284114351104. Its totient is φ = 139837531680.

The previous prime is 211421030363. The next prime is 211421030437. The reversal of 211421030421 is 124030124112.

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

It is not a de Polignac number, because 211421030421 - 2³⁰ = 210347288597 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 (211421030441) 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, 277455040 + ... + 277455801.

It is an arithmetic number, because the mean of its divisors is an integer number (35514293888).

Almost surely, 2^211421030421 is an apocalyptic number.

It is an amenable number.

211421030421 is a deficient number, since it is larger than the sum of its proper divisors (72693320683).

211421030421 is a wasteful number, since it uses less digits than its factorization.

211421030421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554910971.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 211421030421 its reverse (124030124112), we get a palindrome (335451154533).

The spelling of 211421030421 in words is "two hundred eleven billion, four hundred twenty-one million, thirty thousand, four hundred twenty-one".