102217961 has 4 divisors (see below), whose sum is σ = 104711124. Its totient is φ = 99724800.

The previous prime is 102217949. The next prime is 102217963. The reversal of 102217961 is 169712201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 169712201 = 53 ⋅3202117.

It can be written as a sum of positive squares in 2 ways, for example, as 9211225 + 93006736 = 3035^2 + 9644^2 .

It is a cyclic number.

It is not a de Polignac number, because 102217961 - 2⁶ = 102217897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102217963) 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, 1246520 + ... + 1246601.

It is an arithmetic number, because the mean of its divisors is an integer number (26177781).

Almost surely, 2^102217961 is an apocalyptic number.

It is an amenable number.

102217961 is a deficient number, since it is larger than the sum of its proper divisors (2493163).

102217961 is an equidigital number, since it uses as much as digits as its factorization.

102217961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2493162.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 102217961 is about 10110.2898573681. The cubic root of 102217961 is about 467.5654417621.

The spelling of 102217961 in words is "one hundred two million, two hundred seventeen thousand, nine hundred sixty-one".