12020113021 has 12 divisors (see below), whose sum is σ = 14027271132. Its totient is φ = 10270024128.

The previous prime is 12020113009. The next prime is 12020113067. The reversal of 12020113021 is 12031102021.

It can be written as a sum of positive squares in 2 ways, for example, as 3521116921 + 8498996100 = 59339^2 + 92190^2 .

It is not a de Polignac number, because 12020113021 - 2⁵ = 12020112989 is a prime.

It is a super-2 number, since 2×12020113021² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12020112992 and 12020113010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020113921) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 376530 + ... + 407203.

It is an arithmetic number, because the mean of its divisors is an integer number (1168939261).

Almost surely, 2^12020113021 is an apocalyptic number.

It is an amenable number.

12020113021 is a deficient number, since it is larger than the sum of its proper divisors (2007158111).

12020113021 is an equidigital number, since it uses as much as digits as its factorization.

12020113021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784060 (or 784053 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 12020113021 its reverse (12031102021), we get a palindrome (24051215042).

The spelling of 12020113021 in words is "twelve billion, twenty million, one hundred thirteen thousand, twenty-one".