102421021124 has 12 divisors (see below), whose sum is σ = 179717317164. Its totient is φ = 51073216224.

The previous prime is 102421021123. The next prime is 102421021139. The reversal of 102421021124 is 421120124201.

It can be written as a sum of positive squares in 2 ways, for example, as 18691811524 + 83729209600 = 136718^2 + 289360^2 .

It is a junction number, because it is equal to n+sod(n) for n = 102421021096 and 102421021105.

It is not an unprimeable number, because it can be changed into a prime (102421021123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34321907 + ... + 34324890.

It is an arithmetic number, because the mean of its divisors is an integer number (14976443097).

Almost surely, 2^102421021124 is an apocalyptic number.

It is an amenable number.

102421021124 is a deficient number, since it is larger than the sum of its proper divisors (77296296040).

102421021124 is a wasteful number, since it uses less digits than its factorization.

102421021124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68647174 (or 68647172 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 102421021124 its reverse (421120124201), we get a palindrome (523541145325).

The spelling of 102421021124 in words is "one hundred two billion, four hundred twenty-one million, twenty-one thousand, one hundred twenty-four".