102011121 has 12 divisors (see below), whose sum is σ = 147468048. Its totient is φ = 67952664.

The previous prime is 102011113. The next prime is 102011191. The reversal of 102011121 is 121110201.

It is a happy number.

It is not a de Polignac number, because 102011121 - 2³ = 102011113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (102011191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9526 + ... + 17168.

It is an arithmetic number, because the mean of its divisors is an integer number (12289004).

Almost surely, 2^102011121 is an apocalyptic number.

It is an amenable number.

102011121 is a deficient number, since it is larger than the sum of its proper divisors (45456927).

102011121 is a wasteful number, since it uses less digits than its factorization.

102011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9132 (or 9129 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 102011121 is about 10100.0554948970. The cubic root of 102011121 is about 467.2498529269.

Adding to 102011121 its reverse (121110201), we get a palindrome (223121322).

The spelling of 102011121 in words is "one hundred two million, eleven thousand, one hundred twenty-one".