311103311023220 has 12 divisors (see below), whose sum is σ = 653316953148804. Its totient is φ = 124441324409280.

The previous prime is 311103311023201. The next prime is 311103311023229. The reversal of 311103311023220 is 22320113301113.

It can be written as a sum of positive squares in 2 ways, for example, as 228615246720784 + 82488064302436 = 15120028^2 + 9082294^2 .

It is a super-2 number, since 2×311103311023220² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311103311023229) 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, 7777582775561 + ... + 7777582775600.

It is an arithmetic number, because the mean of its divisors is an integer number (54443079429067).

Almost surely, 2^{311103311023220} is an apocalyptic number.

It is an amenable number.

311103311023220 is an abundant number, since it is smaller than the sum of its proper divisors (342213642125584).

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

311103311023220 is a wasteful number, since it uses less digits than its factorization.

311103311023220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15555165551170 (or 15555165551168 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 311103311023220 its reverse (22320113301113), we get a palindrome (333423424324333).

The spelling of 311103311023220 in words is "three hundred eleven trillion, one hundred three billion, three hundred eleven million, twenty-three thousand, two hundred twenty".