105310021394 has 4 divisors (see below), whose sum is σ = 157965032094. Its totient is φ = 52655010696.

The previous prime is 105310021393. The next prime is 105310021441. The reversal of 105310021394 is 493120013501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 105147790225 + 162231169 = 324265^2 + 12737^2 .

It is a super-2 number, since 2×105310021394² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105310021393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26327505347 + ... + 26327505350.

Almost surely, 2^105310021394 is an apocalyptic number.

105310021394 is a deficient number, since it is larger than the sum of its proper divisors (52655010700).

105310021394 is an equidigital number, since it uses as much as digits as its factorization.

105310021394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52655010699.

The product of its (nonzero) digits is 3240, while the sum is 29.

Adding to 105310021394 its reverse (493120013501), we get a palindrome (598430034895).

The spelling of 105310021394 in words is "one hundred five billion, three hundred ten million, twenty-one thousand, three hundred ninety-four".