102551121 has 12 divisors (see below), whose sum is σ = 148299060. Its totient is φ = 68289120.

The previous prime is 102551117. The next prime is 102551149. The reversal of 102551121 is 121155201.

102551121 is a `hidden beast` number, since 102 + 551 + 12 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 89870400 + 12680721 = 9480^2 + 3561^2 .

It is not a de Polignac number, because 102551121 - 2² = 102551117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102551094 and 102551103.

It is not an unprimeable number, because it can be changed into a prime (102551171) 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 11 ways as a sum of consecutive naturals, for example, 2415 + ... + 14523.

It is an arithmetic number, because the mean of its divisors is an integer number (12358255).

Almost surely, 2^102551121 is an apocalyptic number.

It is an amenable number.

102551121 is a deficient number, since it is larger than the sum of its proper divisors (45747939).

102551121 is a wasteful number, since it uses less digits than its factorization.

102551121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13056 (or 13053 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The square root of 102551121 is about 10126.7527371809. The cubic root of 102551121 is about 468.0728710767.

The spelling of 102551121 in words is "one hundred two million, five hundred fifty-one thousand, one hundred twenty-one".