20201200121101 has 4 divisors (see below), whose sum is σ = 20208872436732. Its totient is φ = 20193527805472.

The previous prime is 20201200121099. The next prime is 20201200121107. The reversal of 20201200121101 is 10112100210202.

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 10860682758025 + 9340517363076 = 3295555^2 + 3056226^2 .

It is a cyclic number.

It is not a de Polignac number, because 20201200121101 - 2¹ = 20201200121099 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 (20201200121107) 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, 3836153866 + ... + 3836159131.

It is an arithmetic number, because the mean of its divisors is an integer number (5052218109183).

Almost surely, 2^{20201200121101} is an apocalyptic number.

It is an amenable number.

20201200121101 is a deficient number, since it is larger than the sum of its proper divisors (7672315631).

20201200121101 is an equidigital number, since it uses as much as digits as its factorization.

20201200121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7672315630.

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

Adding to 20201200121101 its reverse (10112100210202), we get a palindrome (30313300331303).

The spelling of 20201200121101 in words is "twenty trillion, two hundred one billion, two hundred million, one hundred twenty-one thousand, one hundred one".