102121156 has 12 divisors (see below), whose sum is σ = 178880940. Its totient is φ = 51012320.

The previous prime is 102121141. The next prime is 102121157. The reversal of 102121156 is 651121201.

It can be written as a sum of positive squares in 2 ways, for example, as 6081156 + 96040000 = 2466^2 + 9800^2 .

It is not an unprimeable number, because it can be changed into a prime (102121157) 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 3 ways as a sum of consecutive naturals, for example, 7075 + ... + 15946.

It is an arithmetic number, because the mean of its divisors is an integer number (14906745).

Almost surely, 2^102121156 is an apocalyptic number.

It is an amenable number.

102121156 is a deficient number, since it is larger than the sum of its proper divisors (76759784).

102121156 is a wasteful number, since it uses less digits than its factorization.

102121156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24134 (or 24132 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 102121156 is about 10105.5012740586. The cubic root of 102121156 is about 467.4177933180.

Adding to 102121156 its reverse (651121201), we get a palindrome (753242357).

The spelling of 102121156 in words is "one hundred two million, one hundred twenty-one thousand, one hundred fifty-six".