220121012101111 has 32 divisors (see below), whose sum is σ = 247801452788736. Its totient is φ = 195413482756800.

The previous prime is 220121012101099. The next prime is 220121012101147. The reversal of 220121012101111 is 111101210121022.

It is not a de Polignac number, because 220121012101111 - 2²⁹ = 220120475230199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220121012101171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 262337835 + ... + 263175571.

It is an arithmetic number, because the mean of its divisors is an integer number (7743795399648).

Almost surely, 2^{220121012101111} is an apocalyptic number.

220121012101111 is a deficient number, since it is larger than the sum of its proper divisors (27680440687625).

220121012101111 is an equidigital number, since it uses as much as digits as its factorization.

220121012101111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842404 (or 842382 counting only the distinct ones).

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

Adding to 220121012101111 its reverse (111101210121022), we get a palindrome (331222222222133).

It can be divided in two parts, 2201210121011 and 11, that added together give a palindrome (2201210121022).

The spelling of 220121012101111 in words is "two hundred twenty trillion, one hundred twenty-one billion, twelve million, one hundred one thousand, one hundred eleven".