211142420321 has 4 divisors (see below), whose sum is σ = 241305623232. Its totient is φ = 180979217412.

The previous prime is 211142420311. The next prime is 211142420323. The reversal of 211142420321 is 123024241112.

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 not a de Polignac number, because 211142420321 - 2¹⁰ = 211142419297 is a prime.

It is a super-2 number, since 2×211142420321² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211142420323) 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, 15081601445 + ... + 15081601458.

It is an arithmetic number, because the mean of its divisors is an integer number (60326405808).

Almost surely, 2^211142420321 is an apocalyptic number.

It is an amenable number.

211142420321 is a deficient number, since it is larger than the sum of its proper divisors (30163202911).

211142420321 is an equidigital number, since it uses as much as digits as its factorization.

211142420321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30163202910.

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

Adding to 211142420321 its reverse (123024241112), we get a palindrome (334166661433).

The spelling of 211142420321 in words is "two hundred eleven billion, one hundred forty-two million, four hundred twenty thousand, three hundred twenty-one".