102211311 has 4 divisors (see below), whose sum is σ = 136281752. Its totient is φ = 68140872.

The previous prime is 102211303. The next prime is 102211331. The reversal of 102211311 is 113112201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113112201 = 3 ⋅37704067.

It is not a de Polignac number, because 102211311 - 2³ = 102211303 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 (102211331) 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, 17035216 + ... + 17035221.

It is an arithmetic number, because the mean of its divisors is an integer number (34070438).

Almost surely, 2^102211311 is an apocalyptic number.

102211311 is a deficient number, since it is larger than the sum of its proper divisors (34070441).

102211311 is an equidigital number, since it uses as much as digits as its factorization.

102211311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34070440.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 102211311 is about 10109.9609791532. The cubic root of 102211311 is about 467.5553020646. Note that the first 3 decimals are identical.

Adding to 102211311 its reverse (113112201), we get a palindrome (215323512).

The spelling of 102211311 in words is "one hundred two million, two hundred eleven thousand, three hundred eleven".