105201231421 has 32 divisors (see below), whose sum is σ = 125899079040. Its totient is φ = 86638636800.

The previous prime is 105201231397. The next prime is 105201231433. The reversal of 105201231421 is 124132102501.

It is a cyclic number.

It is not a de Polignac number, because 105201231421 - 2⁹ = 105201230909 is a prime.

It is a super-2 number, since 2×105201231421² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 105201231392 and 105201231401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105201231491) 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 31 ways as a sum of consecutive naturals, for example, 5161711 + ... + 5182051.

It is an arithmetic number, because the mean of its divisors is an integer number (3934346220).

Almost surely, 2^105201231421 is an apocalyptic number.

105201231421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

105201231421 is a deficient number, since it is larger than the sum of its proper divisors (20697847619).

105201231421 is a wasteful number, since it uses less digits than its factorization.

105201231421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21037.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 105201231421 its reverse (124132102501), we get a palindrome (229333333922).

The spelling of 105201231421 in words is "one hundred five billion, two hundred one million, two hundred thirty-one thousand, four hundred twenty-one".