211431402129 has 4 divisors (see below), whose sum is σ = 281908536176. Its totient is φ = 140954268084.

The previous prime is 211431402097. The next prime is 211431402163. The reversal of 211431402129 is 921204134112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 211431402129 - 2⁵ = 211431402097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211431402096 and 211431402105.

It is not an unprimeable number, because it can be changed into a prime (211431402199) 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, 35238567019 + ... + 35238567024.

It is an arithmetic number, because the mean of its divisors is an integer number (70477134044).

Almost surely, 2^211431402129 is an apocalyptic number.

It is an amenable number.

211431402129 is a deficient number, since it is larger than the sum of its proper divisors (70477134047).

211431402129 is an equidigital number, since it uses as much as digits as its factorization.

211431402129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70477134046.

The product of its (nonzero) digits is 3456, while the sum is 30.

The spelling of 211431402129 in words is "two hundred eleven billion, four hundred thirty-one million, four hundred two thousand, one hundred twenty-nine".