201221020011101 has 4 divisors (see below), whose sum is σ = 201221616836352. Its totient is φ = 201220423185852.

The previous prime is 201221020011091. The next prime is 201221020011107. The reversal of 201221020011101 is 101110020122102.

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 not a de Polignac number, because 201221020011101 - 2¹⁰ = 201221020010077 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 (201221020011107) 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, 297906611 + ... + 298581296.

It is an arithmetic number, because the mean of its divisors is an integer number (50305404209088).

Almost surely, 2^{201221020011101} is an apocalyptic number.

It is an amenable number.

201221020011101 is a deficient number, since it is larger than the sum of its proper divisors (596825251).

201221020011101 is an equidigital number, since it uses as much as digits as its factorization.

201221020011101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596825250.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 201221020011101 its reverse (101110020122102), we get a palindrome (302331040133203).

The spelling of 201221020011101 in words is "two hundred one trillion, two hundred twenty-one billion, twenty million, eleven thousand, one hundred one".