102121012 has 24 divisors (see below), whose sum is σ = 213123456. Its totient is φ = 41863008.

The previous prime is 102121007. The next prime is 102121013. The reversal of 102121012 is 210121201.

It is a self number, because there is not a number n which added to its sum of digits gives 102121012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102121013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78643 + ... + 79930.

It is an arithmetic number, because the mean of its divisors is an integer number (8880144).

Almost surely, 2^102121012 is an apocalyptic number.

It is an amenable number.

102121012 is an abundant number, since it is smaller than the sum of its proper divisors (111002444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102121012 is a wasteful number, since it uses less digits than its factorization.

102121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158607 (or 158605 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 102121012 is about 10105.4941492240. The cubic root of 102121012 is about 467.4175736175.

Adding to 102121012 its reverse (210121201), we get a palindrome (312242213).

The spelling of 102121012 in words is "one hundred two million, one hundred twenty-one thousand, twelve".