210122011109 has 8 divisors (see below), whose sum is σ = 212045710968. Its totient is φ = 208206694080.

The previous prime is 210122011093. The next prime is 210122011153. The reversal of 210122011109 is 901110221012.

It can be written as a sum of positive squares in 4 ways, for example, as 36053654884 + 174068356225 = 189878^2 + 417215^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 210122011109 - 2⁴ = 210122011093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210122011189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2045342 + ... + 2145615.

It is an arithmetic number, because the mean of its divisors is an integer number (26505713871).

Almost surely, 2^210122011109 is an apocalyptic number.

It is an amenable number.

210122011109 is a deficient number, since it is larger than the sum of its proper divisors (1923699859).

210122011109 is a wasteful number, since it uses less digits than its factorization.

210122011109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4191415.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 210122011109 in words is "two hundred ten billion, one hundred twenty-two million, eleven thousand, one hundred nine".