102124244421 has 20 divisors (see below), whose sum is σ = 152859323232. Its totient is φ = 67947448968.

The previous prime is 102124244407. The next prime is 102124244473. The reversal of 102124244421 is 124442421201.

102124244421 is a `hidden beast` number, since 1 + 0 + 212 + 4 + 2 + 4 + 442 + 1 = 666.

It is not a de Polignac number, because 102124244421 - 2⁷ = 102124244293 is a prime.

It is a super-2 number, since 2×102124244421² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102124244221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1212531 + ... + 1294016.

Almost surely, 2^102124244421 is an apocalyptic number.

It is an amenable number.

102124244421 is a deficient number, since it is larger than the sum of its proper divisors (50735078811).

102124244421 is an equidigital number, since it uses as much as digits as its factorization.

102124244421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2507062 (or 2507053 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

Adding to 102124244421 its reverse (124442421201), we get a palindrome (226566665622).

The spelling of 102124244421 in words is "one hundred two billion, one hundred twenty-four million, two hundred forty-four thousand, four hundred twenty-one".