20121020110101 has 4 divisors (see below), whose sum is σ = 26828026813472. Its totient is φ = 13414013406732.

The previous prime is 20121020110073. The next prime is 20121020110109. The reversal of 20121020110101 is 10101102012102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20121020110101 - 2¹¹ = 20121020108053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121020110109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3353503351681 + ... + 3353503351686.

It is an arithmetic number, because the mean of its divisors is an integer number (6707006703368).

Almost surely, 2^{20121020110101} is an apocalyptic number.

It is an amenable number.

20121020110101 is a deficient number, since it is larger than the sum of its proper divisors (6707006703371).

20121020110101 is an equidigital number, since it uses as much as digits as its factorization.

20121020110101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6707006703370.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20121020110101 its reverse (10101102012102), we get a palindrome (30222122122203).

The spelling of 20121020110101 in words is "twenty trillion, one hundred twenty-one billion, twenty million, one hundred ten thousand, one hundred one".