999999999953211 has 16 divisors (see below), whose sum is σ = 1352983477683200. Its totient is φ = 656876250770688.

The previous prime is 999999999953197. The next prime is 999999999953249. The reversal of 999999999953211 is 112359999999999.

It is not a de Polignac number, because 999999999953211 - 2¹¹ = 999999999951163 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 999999999953097 and 999999999953106.

It is not an unprimeable number, because it can be changed into a prime (999999999953011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4331926966 + ... + 4332157803.

It is an arithmetic number, because the mean of its divisors is an integer number (84561467355200).

Almost surely, 2^{999999999953211} is an apocalyptic number.

999999999953211 is a deficient number, since it is larger than the sum of its proper divisors (352983477729989).

999999999953211 is a wasteful number, since it uses less digits than its factorization.

999999999953211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8664085338.

The product of its digits is 104603532030, while the sum is 102.

The spelling of 999999999953211 in words is "nine hundred ninety-nine trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred fifty-three thousand, two hundred eleven".