102840101 has 16 divisors (see below), whose sum is σ = 127083264. Its totient is φ = 81039744.

The previous prime is 102840097. The next prime is 102840121. The reversal of 102840101 is 101048201.

It is a cyclic number.

It is not a de Polignac number, because 102840101 - 2² = 102840097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102840101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102840121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21785 + ... + 26081.

It is an arithmetic number, because the mean of its divisors is an integer number (7942704).

Almost surely, 2^102840101 is an apocalyptic number.

It is an amenable number.

102840101 is a deficient number, since it is larger than the sum of its proper divisors (24243163).

102840101 is a wasteful number, since it uses less digits than its factorization.

102840101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4580.

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 102840101 is about 10141.0108470507. The cubic root of 102840101 is about 468.5121214128.

Adding to 102840101 its reverse (101048201), we get a palindrome (203888302).

The spelling of 102840101 in words is "one hundred two million, eight hundred forty thousand, one hundred one".