20111301021 has 8 divisors (see below), whose sum is σ = 30645792064. Its totient is φ = 11492172000.

The previous prime is 20111300971. The next prime is 20111301043. The reversal of 20111301021 is 12010311102.

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

It is not a de Polignac number, because 20111301021 - 2¹³ = 20111292829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20111300988 and 20111301006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111301061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 478840480 + ... + 478840521.

It is an arithmetic number, because the mean of its divisors is an integer number (3830724008).

Almost surely, 2^20111301021 is an apocalyptic number.

20111301021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20111301021 is a deficient number, since it is larger than the sum of its proper divisors (10534491043).

20111301021 is an equidigital number, since it uses as much as digits as its factorization.

20111301021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957681011.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 20111301021 its reverse (12010311102), we get a palindrome (32121612123).

The spelling of 20111301021 in words is "twenty billion, one hundred eleven million, three hundred one thousand, twenty-one".