211131430420 has 12 divisors (see below), whose sum is σ = 443376003924. Its totient is φ = 84452572160.

The previous prime is 211131430409. The next prime is 211131430427. The reversal of 211131430420 is 24034131112.

It can be written as a sum of positive squares in 2 ways, for example, as 130686588036 + 80444842384 = 361506^2 + 283628^2 .

It is a super-2 number, since 2×211131430420² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211131430391 and 211131430400.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5278285741 + ... + 5278285780.

It is an arithmetic number, because the mean of its divisors is an integer number (36948000327).

Almost surely, 2^211131430420 is an apocalyptic number.

211131430420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211131430420 is an abundant number, since it is smaller than the sum of its proper divisors (232244573504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211131430420 is a wasteful number, since it uses less digits than its factorization.

211131430420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10556571530 (or 10556571528 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 211131430420 its reverse (24034131112), we get a palindrome (235165561532).

The spelling of 211131430420 in words is "two hundred eleven billion, one hundred thirty-one million, four hundred thirty thousand, four hundred twenty".