211421401431 has 4 divisors (see below), whose sum is σ = 281895201912. Its totient is φ = 140947600952.

The previous prime is 211421401423. The next prime is 211421401463. The reversal of 211421401431 is 134104124112.

It is a happy number.

211421401431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211421401431 - 2³ = 211421401423 is a prime.

It is a super-2 number, since 2×211421401431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211421401531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35236900236 + ... + 35236900241.

It is an arithmetic number, because the mean of its divisors is an integer number (70473800478).

Almost surely, 2^211421401431 is an apocalyptic number.

211421401431 is a deficient number, since it is larger than the sum of its proper divisors (70473800481).

211421401431 is an equidigital number, since it uses as much as digits as its factorization.

211421401431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70473800480.

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 211421401431 its reverse (134104124112), we get a palindrome (345525525543).

The spelling of 211421401431 in words is "two hundred eleven billion, four hundred twenty-one million, four hundred one thousand, four hundred thirty-one".