102051121 has 4 divisors (see below), whose sum is σ = 102176244. Its totient is φ = 101926000.

The previous prime is 102051097. The next prime is 102051133. The reversal of 102051121 is 121150201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121150201 = 31 ⋅3908071.

It can be written as a sum of positive squares in 2 ways, for example, as 64400625 + 37650496 = 8025^2 + 6136^2 .

It is a cyclic number.

It is not a de Polignac number, because 102051121 - 2¹⁹ = 101526833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102051151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61330 + ... + 62971.

It is an arithmetic number, because the mean of its divisors is an integer number (25544061).

Almost surely, 2^102051121 is an apocalyptic number.

It is an amenable number.

102051121 is a deficient number, since it is larger than the sum of its proper divisors (125123).

102051121 is an equidigital number, since it uses as much as digits as its factorization.

102051121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125122.

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 102051121 is about 10102.0354879598. The cubic root of 102051121 is about 467.3109166998.

The spelling of 102051121 in words is "one hundred two million, fifty-one thousand, one hundred twenty-one".