102134218661 has 4 divisors (see below), whose sum is σ = 105656088300. Its totient is φ = 98612349024.

The previous prime is 102134218583. The next prime is 102134218687. The reversal of 102134218661 is 166812431201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71713626436 + 30420592225 = 267794^2 + 174415^2 .

It is a cyclic number.

It is not a de Polignac number, because 102134218661 - 2¹⁴ = 102134202277 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 (102134218691) 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, 1760934776 + ... + 1760934833.

It is an arithmetic number, because the mean of its divisors is an integer number (26414022075).

Almost surely, 2^102134218661 is an apocalyptic number.

It is an amenable number.

102134218661 is a deficient number, since it is larger than the sum of its proper divisors (3521869639).

102134218661 is an equidigital number, since it uses as much as digits as its factorization.

102134218661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3521869638.

The product of its (nonzero) digits is 13824, while the sum is 35.

Adding to 102134218661 its reverse (166812431201), we get a palindrome (268946649862).

The spelling of 102134218661 in words is "one hundred two billion, one hundred thirty-four million, two hundred eighteen thousand, six hundred sixty-one".