201220120200101 has 4 divisors (see below), whose sum is σ = 201220148630592. Its totient is φ = 201220091769612.

The previous prime is 201220120200097. The next prime is 201220120200149. The reversal of 201220120200101 is 101002021022102.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 201220120200101 - 2² = 201220120200097 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 (201220120208101) 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, 5722196 + ... + 20861058.

It is an arithmetic number, because the mean of its divisors is an integer number (50305037157648).

Almost surely, 2^{201220120200101} is an apocalyptic number.

It is an amenable number.

201220120200101 is a deficient number, since it is larger than the sum of its proper divisors (28430491).

201220120200101 is a wasteful number, since it uses less digits than its factorization.

201220120200101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28430490.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 201220120200101 its reverse (101002021022102), we get a palindrome (302222141222203).

The spelling of 201220120200101 in words is "two hundred one trillion, two hundred twenty billion, one hundred twenty million, two hundred thousand, one hundred one".