211142320421 has 8 divisors (see below), whose sum is σ = 211341170880. Its totient is φ = 210943562688.

The previous prime is 211142320409. The next prime is 211142320453. The reversal of 211142320421 is 124023241112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211142320421 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 (211142320021) 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, 5040200 + ... + 5081918.

It is an arithmetic number, because the mean of its divisors is an integer number (26417646360).

Almost surely, 2^211142320421 is an apocalyptic number.

It is an amenable number.

211142320421 is a deficient number, since it is larger than the sum of its proper divisors (198850459).

211142320421 is a wasteful number, since it uses less digits than its factorization.

211142320421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46363.

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

Adding to 211142320421 its reverse (124023241112), we get a palindrome (335165561533).

The spelling of 211142320421 in words is "two hundred eleven billion, one hundred forty-two million, three hundred twenty thousand, four hundred twenty-one".