102220660624 has 20 divisors (see below), whose sum is σ = 198058985244. Its totient is φ = 51108664448.

The previous prime is 102220660621. The next prime is 102220660637. The reversal of 102220660624 is 426066022201.

It can be written as a sum of positive squares in 2 ways, for example, as 45766900624 + 56453760000 = 213932^2 + 237600^2 .

It is not an unprimeable number, because it can be changed into a prime (102220660621) 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, 512934 + ... + 683770.

Almost surely, 2^102220660624 is an apocalyptic number.

It is an amenable number.

102220660624 is a deficient number, since it is larger than the sum of its proper divisors (95838324620).

102220660624 is a wasteful number, since it uses less digits than its factorization.

102220660624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208242 (or 208236 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 102220660624 its reverse (426066022201), we get a palindrome (528286682825).

The spelling of 102220660624 in words is "one hundred two billion, two hundred twenty million, six hundred sixty thousand, six hundred twenty-four".