211134224021 has 4 divisors (see below), whose sum is σ = 241296256032. Its totient is φ = 180972192012.

The previous prime is 211134224003. The next prime is 211134224053. The reversal of 211134224021 is 120422431112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211134224021 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 (211134224321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15081015995 + ... + 15081016008.

It is an arithmetic number, because the mean of its divisors is an integer number (60324064008).

Almost surely, 2^211134224021 is an apocalyptic number.

It is an amenable number.

211134224021 is a deficient number, since it is larger than the sum of its proper divisors (30162032011).

211134224021 is an equidigital number, since it uses as much as digits as its factorization.

211134224021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30162032010.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 211134224021 its reverse (120422431112), we get a palindrome (331556655133).

The spelling of 211134224021 in words is "two hundred eleven billion, one hundred thirty-four million, two hundred twenty-four thousand, twenty-one".