102001012 has 6 divisors (see below), whose sum is σ = 178501778. Its totient is φ = 51000504.

The previous prime is 102001007. The next prime is 102001027. The reversal of 102001012 is 210100201.

It can be written as a sum of positive squares in only one way, i.e., 100080016 + 1920996 = 10004^2 + 1386^2 .

It is a junction number, because it is equal to n+sod(n) for n = 102000986 and 102001004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12750123 + ... + 12750130.

Almost surely, 2^102001012 is an apocalyptic number.

It is an amenable number.

102001012 is a deficient number, since it is larger than the sum of its proper divisors (76500766).

102001012 is a wasteful number, since it uses less digits than its factorization.

102001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25500257 (or 25500255 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 102001012 is about 10099.5550397035. Note that the first 3 decimals coincide. The cubic root of 102001012 is about 467.2344180581.

Adding to 102001012 its reverse (210100201), we get a palindrome (312101213).

The spelling of 102001012 in words is "one hundred two million, one thousand, twelve".