102121234 has 4 divisors (see below), whose sum is σ = 153181854. Its totient is φ = 51060616.

The previous prime is 102121231. The next prime is 102121237. The reversal of 102121234 is 432121201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 432121201 = 1489 ⋅290209.

It is an interprime number because it is at equal distance from previous prime (102121231) and next prime (102121237).

It can be written as a sum of positive squares in only one way, i.e., 102070609 + 50625 = 10103^2 + 225^2 .

It is not an unprimeable number, because it can be changed into a prime (102121231) 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 as a sum of consecutive naturals, namely, 25530307 + ... + 25530310.

Almost surely, 2^102121234 is an apocalyptic number.

102121234 is a deficient number, since it is larger than the sum of its proper divisors (51060620).

102121234 is an equidigital number, since it uses as much as digits as its factorization.

102121234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51060619.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 102121234 is about 10105.5051333419. The cubic root of 102121234 is about 467.4179123223.

Adding to 102121234 its reverse (432121201), we get a palindrome (534242435).

The spelling of 102121234 in words is "one hundred two million, one hundred twenty-one thousand, two hundred thirty-four".