211131430421 has 8 divisors (see below), whose sum is σ = 211754088000. Its totient is φ = 210509572032.

The previous prime is 211131430409. The next prime is 211131430427. The reversal of 211131430421 is 124034131112.

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-211131430421 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 (211131430427) 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, 331421 + ... + 729453.

It is an arithmetic number, because the mean of its divisors is an integer number (26469261000).

Almost surely, 2^211131430421 is an apocalyptic number.

It is an amenable number.

211131430421 is a deficient number, since it is larger than the sum of its proper divisors (622657579).

211131430421 is a wasteful number, since it uses less digits than its factorization.

211131430421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399595.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 211131430421 its reverse (124034131112), we get a palindrome (335165561533).

The spelling of 211131430421 in words is "two hundred eleven billion, one hundred thirty-one million, four hundred thirty thousand, four hundred twenty-one".