105542235121 has 4 divisors (see below), whose sum is σ = 105545068912.
Its totient is φ = 105539401332.
The previous prime is 105542235119. The next prime is 105542235143. The reversal of 105542235121 is 121532245501.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121532245501 = 31543 ⋅3852907.
It is a cyclic number.
It is not a de Polignac number, because 105542235121 - 21 = 105542235119 is a prime.
It is a super-2 number, since 2×1055422351212 (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 (105542235181) 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, 1360275 + ... + 1435768.
It is an arithmetic number, because the mean of its divisors is an integer number (26386267228).
Almost surely, 2105542235121 is an apocalyptic number.
It is an amenable number.
105542235121 is a deficient number, since it is larger than the sum of its proper divisors (2833791).
105542235121 is an equidigital number, since it uses as much as digits as its factorization.
105542235121 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2833790.
The product of its (nonzero) digits is 12000, while the sum is 31.
The spelling of 105542235121 in words is "one hundred five billion, five hundred forty-two million, two hundred thirty-five thousand, one hundred twenty-one".