211202412431 has 4 divisors (see below), whose sum is σ = 211205049000. Its totient is φ = 211199775864.

The previous prime is 211202412413. The next prime is 211202412469. The reversal of 211202412431 is 134214202112.

211202412431 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 a de Polignac number, because none of the positive numbers 2^k-211202412431 is a prime.

It is a super-2 number, since 2×211202412431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211202412397 and 211202412406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211202412401) 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, 1194236 + ... + 1359633.

It is an arithmetic number, because the mean of its divisors is an integer number (52801262250).

Almost surely, 2^211202412431 is an apocalyptic number.

211202412431 is a deficient number, since it is larger than the sum of its proper divisors (2636569).

211202412431 is an equidigital number, since it uses as much as digits as its factorization.

211202412431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2636568.

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

Adding to 211202412431 its reverse (134214202112), we get a palindrome (345416614543).

The spelling of 211202412431 in words is "two hundred eleven billion, two hundred two million, four hundred twelve thousand, four hundred thirty-one".