102121305443 has 4 divisors (see below), whose sum is σ = 102357151848. Its totient is φ = 101885459040.

The previous prime is 102121305439. The next prime is 102121305449. The reversal of 102121305443 is 344503121201.

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: 344503121201 = 13789 ⋅24983909.

It is a cyclic number.

It is not a de Polignac number, because 102121305443 - 2² = 102121305439 is a prime.

It is a super-2 number, since 2×102121305443² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102121305449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117922553 + ... + 117923418.

It is an arithmetic number, because the mean of its divisors is an integer number (25589287962).

Almost surely, 2^102121305443 is an apocalyptic number.

102121305443 is a deficient number, since it is larger than the sum of its proper divisors (235846405).

102121305443 is an equidigital number, since it uses as much as digits as its factorization.

102121305443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235846404.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 102121305443 its reverse (344503121201), we get a palindrome (446624426644).

The spelling of 102121305443 in words is "one hundred two billion, one hundred twenty-one million, three hundred five thousand, four hundred forty-three".