20201220120111 has 4 divisors (see below), whose sum is σ = 26934960160152. Its totient is φ = 13467480080072.

The previous prime is 20201220120101. The next prime is 20201220120119. The reversal of 20201220120111 is 11102102210202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20201220120111 - 2⁹ = 20201220119599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201220120119) 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, 3366870020016 + ... + 3366870020021.

It is an arithmetic number, because the mean of its divisors is an integer number (6733740040038).

Almost surely, 2^{20201220120111} is an apocalyptic number.

20201220120111 is a deficient number, since it is larger than the sum of its proper divisors (6733740040041).

20201220120111 is an equidigital number, since it uses as much as digits as its factorization.

20201220120111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6733740040040.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20201220120111 its reverse (11102102210202), we get a palindrome (31303322330313).

The spelling of 20201220120111 in words is "twenty trillion, two hundred one billion, two hundred twenty million, one hundred twenty thousand, one hundred eleven".