102421012 has 24 divisors (see below), whose sum is σ = 183947456. Its totient is φ = 49871808.

The previous prime is 102420973. The next prime is 102421019. The reversal of 102421012 is 210124201.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 102420983 and 102421001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102421019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77953 + ... + 79255.

Almost surely, 2^102421012 is an apocalyptic number.

It is an amenable number.

102421012 is a deficient number, since it is larger than the sum of its proper divisors (81526444).

102421012 is a wasteful number, since it uses less digits than its factorization.

102421012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1807 (or 1805 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 102421012 is about 10120.3266745694. The cubic root of 102421012 is about 467.8748356447.

Adding to 102421012 its reverse (210124201), we get a palindrome (312545213).

The spelling of 102421012 in words is "one hundred two million, four hundred twenty-one thousand, twelve".