20121030032113 has 16 divisors (see below), whose sum is σ = 22048710112080. Its totient is φ = 18276586510336.

The previous prime is 20121030032107. The next prime is 20121030032161. The reversal of 20121030032113 is 31123003012102.

It can be written as a sum of positive squares in 8 ways, for example, as 1854150635584 + 18266879396529 = 1361672^2 + 4273977^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121030032113 - 2⁹ = 20121030031601 is a prime.

It is a super-2 number, since 2×20121030032113² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121030032413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7596820 + ... + 9897157.

It is an arithmetic number, because the mean of its divisors is an integer number (1378044382005).

Almost surely, 2^{20121030032113} is an apocalyptic number.

It is an amenable number.

20121030032113 is a deficient number, since it is larger than the sum of its proper divisors (1927680079967).

20121030032113 is a wasteful number, since it uses less digits than its factorization.

20121030032113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17496356.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 20121030032113 its reverse (31123003012102), we get a palindrome (51244033044215).

The spelling of 20121030032113 in words is "twenty trillion, one hundred twenty-one billion, thirty million, thirty-two thousand, one hundred thirteen".