1311203330220 has 192 divisors, whose sum is σ = 4585977962496. Its totient is φ = 272974786560.

The previous prime is 1311203330207. The next prime is 1311203330233. The reversal of 1311203330220 is 220333021131.

It is an interprime number because it is at equal distance from previous prime (1311203330207) and next prime (1311203330233).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2740627 + ... + 3183306.

It is an arithmetic number, because the mean of its divisors is an integer number (23885301888).

Almost surely, 2^{1311203330220} is an apocalyptic number.

1311203330220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311203330220 is an abundant number, since it is smaller than the sum of its proper divisors (3274774632276).

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

1311203330220 is a wasteful number, since it uses less digits than its factorization.

1311203330220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5924000 (or 5923998 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 1311203330220 its reverse (220333021131), we get a palindrome (1531536351351).

The spelling of 1311203330220 in words is "one trillion, three hundred eleven billion, two hundred three million, three hundred thirty thousand, two hundred twenty".