211204034009 has 4 divisors (see below), whose sum is σ = 211983384960. Its totient is φ = 210424683060.

The previous prime is 211204033973. The next prime is 211204034011. The reversal of 211204034009 is 900430402112.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211204034009 is a prime.

It is a super-2 number, since 2×211204034009² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211204334009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389675069 + ... + 389675610.

It is an arithmetic number, because the mean of its divisors is an integer number (52995846240).

Almost surely, 2^211204034009 is an apocalyptic number.

It is an amenable number.

211204034009 is a deficient number, since it is larger than the sum of its proper divisors (779350951).

211204034009 is an equidigital number, since it uses as much as digits as its factorization.

211204034009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779350950.

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 211204034009 in words is "two hundred eleven billion, two hundred four million, thirty-four thousand, nine".