201311110303220 has 24 divisors (see below), whose sum is σ = 422779266517608. Its totient is φ = 80519504144000.

The previous prime is 201311110303211. The next prime is 201311110303231. The reversal of 201311110303220 is 22303011113102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 88911547621264 + 112399562681956 = 9429292^2 + 10601866^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 201311110303192 and 201311110303201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308414411 + ... + 309066450.

It is an arithmetic number, because the mean of its divisors is an integer number (17615802771567).

Almost surely, 2^{201311110303220} is an apocalyptic number.

201311110303220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201311110303220 is an abundant number, since it is smaller than the sum of its proper divisors (221468156214388).

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

201311110303220 is a wasteful number, since it uses less digits than its factorization.

201311110303220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617497171 (or 617497169 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 201311110303220 its reverse (22303011113102), we get a palindrome (223614121416322).

The spelling of 201311110303220 in words is "two hundred one trillion, three hundred eleven billion, one hundred ten million, three hundred three thousand, two hundred twenty".