102011211 has 16 divisors (see below), whose sum is σ = 152148000. Its totient is φ = 67548384.

The previous prime is 102011207. The next prime is 102011219. The reversal of 102011211 is 112110201.

It is a happy number.

It is not a de Polignac number, because 102011211 - 2² = 102011207 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 102011193 and 102011202.

It is not an unprimeable number, because it can be changed into a prime (102011219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8656 + ... + 16701.

It is an arithmetic number, because the mean of its divisors is an integer number (9509250).

Almost surely, 2^102011211 is an apocalyptic number.

102011211 is a deficient number, since it is larger than the sum of its proper divisors (50136789).

102011211 is a wasteful number, since it uses less digits than its factorization.

102011211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25515 (or 25509 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 102011211 is about 10100.0599503171. The cubic root of 102011211 is about 467.2499903383.

Adding to 102011211 its reverse (112110201), we get a palindrome (214121412).

The spelling of 102011211 in words is "one hundred two million, eleven thousand, two hundred eleven".