20111310421 has 8 divisors (see below), whose sum is σ = 20222780760. Its totient is φ = 20000055552.

The previous prime is 20111310397. The next prime is 20111310491. The reversal of 20111310421 is 12401311102.

It can be written as a sum of positive squares in 4 ways, for example, as 3958171396 + 16153139025 = 62914^2 + 127095^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20111310421 - 2⁵ = 20111310389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20111310395 and 20111310404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111310491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135151 + ... + 241843.

It is an arithmetic number, because the mean of its divisors is an integer number (2527847595).

Almost surely, 2^20111310421 is an apocalyptic number.

It is an amenable number.

20111310421 is a deficient number, since it is larger than the sum of its proper divisors (111470339).

20111310421 is a wasteful number, since it uses less digits than its factorization.

20111310421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107735.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 20111310421 its reverse (12401311102), we get a palindrome (32512621523).

The spelling of 20111310421 in words is "twenty billion, one hundred eleven million, three hundred ten thousand, four hundred twenty-one".