102145011 has 4 divisors (see below), whose sum is σ = 136193352. Its totient is φ = 68096672.

The previous prime is 102145009. The next prime is 102145079. The reversal of 102145011 is 110541201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110541201 = 3 ⋅36847067.

It is a cyclic number.

It is not a de Polignac number, because 102145011 - 2¹ = 102145009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102145811) 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, 17024166 + ... + 17024171.

It is an arithmetic number, because the mean of its divisors is an integer number (34048338).

Almost surely, 2^102145011 is an apocalyptic number.

102145011 is a deficient number, since it is larger than the sum of its proper divisors (34048341).

102145011 is an equidigital number, since it uses as much as digits as its factorization.

102145011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34048340.

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 102145011 is about 10106.6815028475. The cubic root of 102145011 is about 467.4541859839.

Adding to 102145011 its reverse (110541201), we get a palindrome (212686212).

It can be divided in two parts, 10214 and 5011, that added together give a triangular number (15225 = T₁₇₄).

The spelling of 102145011 in words is "one hundred two million, one hundred forty-five thousand, eleven".