102820611 has 16 divisors (see below), whose sum is σ = 140747904. Its totient is φ = 66730944.

The previous prime is 102820591. The next prime is 102820667. The reversal of 102820611 is 116028201.

It is not a de Polignac number, because 102820611 - 2⁶ = 102820547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102820691) 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, 43615 + ... + 45911.

It is an arithmetic number, because the mean of its divisors is an integer number (8796744).

Almost surely, 2^102820611 is an apocalyptic number.

102820611 is a deficient number, since it is larger than the sum of its proper divisors (37927293).

102820611 is a wasteful number, since it uses less digits than its factorization.

102820611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2690.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 102820611 is about 10140.0498519485. The cubic root of 102820611 is about 468.4825224591.

Adding to 102820611 its reverse (116028201), we get a palindrome (218848812).

The spelling of 102820611 in words is "one hundred two million, eight hundred twenty thousand, six hundred eleven".