20121010120201 has 4 divisors (see below), whose sum is σ = 20121050704132. Its totient is φ = 20120969536272.

The previous prime is 20121010120129. The next prime is 20121010120213. The reversal of 20121010120201 is 10202101012102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9941560344576 + 10179449775625 = 3153024^2 + 3190525^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121010120201 - 2¹⁵ = 20121010087433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121010120261) 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, 19538970 + ... + 20542963.

It is an arithmetic number, because the mean of its divisors is an integer number (5030262676033).

Almost surely, 2^{20121010120201} is an apocalyptic number.

It is an amenable number.

20121010120201 is a deficient number, since it is larger than the sum of its proper divisors (40583931).

20121010120201 is an equidigital number, since it uses as much as digits as its factorization.

20121010120201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40583930.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20121010120201 its reverse (10202101012102), we get a palindrome (30323111132303).

The spelling of 20121010120201 in words is "twenty trillion, one hundred twenty-one billion, ten million, one hundred twenty thousand, two hundred one".