20121200110001 has 4 divisors (see below), whose sum is σ = 20185485094692. Its totient is φ = 20056915125312.

The previous prime is 20121200109977. The next prime is 20121200110003. The reversal of 20121200110001 is 10001100212102.

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 1601044824976 + 18520155285025 = 1265324^2 + 4303505^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121200110001 - 2³⁴ = 20104020240817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121200110003) 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, 32142491876 + ... + 32142492501.

It is an arithmetic number, because the mean of its divisors is an integer number (5046371273673).

Almost surely, 2^{20121200110001} is an apocalyptic number.

It is an amenable number.

20121200110001 is a deficient number, since it is larger than the sum of its proper divisors (64284984691).

20121200110001 is an equidigital number, since it uses as much as digits as its factorization.

20121200110001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64284984690.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20121200110001 its reverse (10001100212102), we get a palindrome (30122300322103).

The spelling of 20121200110001 in words is "twenty trillion, one hundred twenty-one billion, two hundred million, one hundred ten thousand, one".