20211220011101 has 16 divisors (see below), whose sum is σ = 23598996779520. Its totient is φ = 16948839442560.

The previous prime is 20211220011067. The next prime is 20211220011113. The reversal of 20211220011101 is 10111002211202.

It is a cyclic number.

It is not a de Polignac number, because 20211220011101 - 2³⁰ = 20210146269277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211220011121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10856936 + ... + 12581553.

It is an arithmetic number, because the mean of its divisors is an integer number (1474937298720).

Almost surely, 2^{20211220011101} is an apocalyptic number.

It is an amenable number.

20211220011101 is a deficient number, since it is larger than the sum of its proper divisors (3387776768419).

20211220011101 is a wasteful number, since it uses less digits than its factorization.

20211220011101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23441164.

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

Adding to 20211220011101 its reverse (10111002211202), we get a palindrome (30322222222303).

The spelling of 20211220011101 in words is "twenty trillion, two hundred eleven billion, two hundred twenty million, eleven thousand, one hundred one".