2111172171210 has 48 divisors (see below), whose sum is σ = 5637400293096. Its totient is φ = 547763589504.

The previous prime is 2111172171197. The next prime is 2111172171211. The reversal of 2111172171210 is 121712711112.

2111172171210 is a `hidden beast` number, since 2 + 111 + 172 + 171 + 210 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2020864108041 + 90308063169 = 1421571^2 + 300513^2 .

It is not an unprimeable number, because it can be changed into a prime (2111172171211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 316989489 + ... + 316996148.

Almost surely, 2^{2111172171210} is an apocalyptic number.

2111172171210 is an abundant number, since it is smaller than the sum of its proper divisors (3526228121886).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2111172171210 is a wasteful number, since it uses less digits than its factorization.

2111172171210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633985687 (or 633985684 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 27.

Adding to 2111172171210 its reverse (121712711112), we get a palindrome (2232884882322).

The spelling of 2111172171210 in words is "two trillion, one hundred eleven billion, one hundred seventy-two million, one hundred seventy-one thousand, two hundred ten".