102172021012 has 6 divisors (see below), whose sum is σ = 178801036778. Its totient is φ = 51086010504.

The previous prime is 102172020997. The next prime is 102172021027. The reversal of 102172021012 is 210120271201.

102172021012 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (102172020997) and next prime (102172021027).

It can be written as a sum of positive squares in only one way, i.e., 95879406736 + 6292614276 = 309644^2 + 79326^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 12771502623 + ... + 12771502630.

Almost surely, 2^102172021012 is an apocalyptic number.

It is an amenable number.

102172021012 is a deficient number, since it is larger than the sum of its proper divisors (76629015766).

102172021012 is a wasteful number, since it uses less digits than its factorization.

102172021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25543005257 (or 25543005255 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 19.

Adding to 102172021012 its reverse (210120271201), we get a palindrome (312292292213).

The spelling of 102172021012 in words is "one hundred two billion, one hundred seventy-two million, twenty-one thousand, twelve".