201220011101 has 4 divisors (see below), whose sum is σ = 202021684704. Its totient is φ = 200418337500.

The previous prime is 201220011079. The next prime is 201220011121. The reversal of 201220011101 is 101110022102.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201220011101 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 (201220011121) 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, 400836425 + ... + 400836926.

It is an arithmetic number, because the mean of its divisors is an integer number (50505421176).

Almost surely, 2^201220011101 is an apocalyptic number.

It is an amenable number.

201220011101 is a deficient number, since it is larger than the sum of its proper divisors (801673603).

201220011101 is an equidigital number, since it uses as much as digits as its factorization.

201220011101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801673602.

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

Adding to 201220011101 its reverse (101110022102), we get a palindrome (302330033203).

The spelling of 201220011101 in words is "two hundred one billion, two hundred twenty million, eleven thousand, one hundred one".