105542300021 has 4 divisors (see below), whose sum is σ = 105545984544. Its totient is φ = 105538615500.

The previous prime is 105542300011. The next prime is 105542300027. The reversal of 105542300021 is 120003245501.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105542300021 is a prime.

It is a super-2 number, since 2×105542300021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 105542300021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105542300027) 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, 1798955 + ... + 1856696.

It is an arithmetic number, because the mean of its divisors is an integer number (26386496136).

Almost surely, 2^105542300021 is an apocalyptic number.

It is an amenable number.

105542300021 is a deficient number, since it is larger than the sum of its proper divisors (3684523).

105542300021 is an equidigital number, since it uses as much as digits as its factorization.

105542300021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3684522.

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 105542300021 its reverse (120003245501), we get a palindrome (225545545522).

The spelling of 105542300021 in words is "one hundred five billion, five hundred forty-two million, three hundred thousand, twenty-one".