201111111301220 has 48 divisors (see below), whose sum is σ = 447181003786608. Its totient is φ = 75711650918400.

The previous prime is 201111111301213. The next prime is 201111111301223. The reversal of 201111111301220 is 22103111111102.

201111111301220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 2848716098596 + 198262395202624 = 1687814^2 + 14080568^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (201111111301223) 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, 31165520 + ... + 37060920.

It is an arithmetic number, because the mean of its divisors is an integer number (9316270912221).

Almost surely, 2^{201111111301220} is an apocalyptic number.

201111111301220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201111111301220 is an abundant number, since it is smaller than the sum of its proper divisors (246069892485388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201111111301220 is a wasteful number, since it uses less digits than its factorization.

201111111301220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5995760 (or 5995758 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 201111111301220 its reverse (22103111111102), we get a palindrome (223214222412322).

The spelling of 201111111301220 in words is "two hundred one trillion, one hundred eleven billion, one hundred eleven million, three hundred one thousand, two hundred twenty".