211210111022109 has 4 divisors (see below), whose sum is σ = 281613481362816. Its totient is φ = 140806740681404.

The previous prime is 211210111022051. The next prime is 211210111022137. The reversal of 211210111022109 is 901220111012112.

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 not a de Polignac number, because 211210111022109 - 2¹⁵ = 211210110989341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211210111022159) 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, 35201685170349 + ... + 35201685170354.

It is an arithmetic number, because the mean of its divisors is an integer number (70403370340704).

Almost surely, 2^{211210111022109} is an apocalyptic number.

It is an amenable number.

211210111022109 is a deficient number, since it is larger than the sum of its proper divisors (70403370340707).

211210111022109 is an equidigital number, since it uses as much as digits as its factorization.

211210111022109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70403370340706.

The product of its (nonzero) digits is 144, while the sum is 24.

The spelling of 211210111022109 in words is "two hundred eleven trillion, two hundred ten billion, one hundred eleven million, twenty-two thousand, one hundred nine".