101221010140421 has 8 divisors (see below), whose sum is σ = 101487196962840. Its totient is φ = 100954853978112.

The previous prime is 101221010140381. The next prime is 101221010140427. The reversal of 101221010140421 is 124041010122101.

It can be written as a sum of positive squares in 4 ways, for example, as 2493714722500 + 98727295417921 = 1579150^2 + 9936161^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101221010140421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101221010140393 and 101221010140402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221010140427) 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 7 ways as a sum of consecutive naturals, for example, 1046060 + ... + 14266613.

It is an arithmetic number, because the mean of its divisors is an integer number (12685899620355).

Almost surely, 2^{101221010140421} is an apocalyptic number.

It is an amenable number.

101221010140421 is a deficient number, since it is larger than the sum of its proper divisors (266186822419).

101221010140421 is a wasteful number, since it uses less digits than its factorization.

101221010140421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15330055.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 101221010140421 its reverse (124041010122101), we get a palindrome (225262020262522).

The spelling of 101221010140421 in words is "one hundred one trillion, two hundred twenty-one billion, ten million, one hundred forty thousand, four hundred twenty-one".