1213120111320 has 96 divisors (see below), whose sum is σ = 4245920406000. Its totient is φ = 298614180096.

The previous prime is 1213120111303. The next prime is 1213120111337. The reversal of 1213120111320 is 231110213121.

1213120111320 is a `hidden beast` number, since 1 + 2 + 131 + 201 + 11 + 320 = 666.

It is an interprime number because it is at equal distance from previous prime (1213120111303) and next prime (1213120111337).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1213120111293 and 1213120111302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129602170 + ... + 129611529.

Almost surely, 2^{1213120111320} is an apocalyptic number.

1213120111320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213120111320 is an abundant number, since it is smaller than the sum of its proper divisors (3032800294680).

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

1213120111320 is a wasteful number, since it uses less digits than its factorization.

1213120111320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259213729 (or 259213722 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1213120111320 its reverse (231110213121), we get a palindrome (1444230324441).

The spelling of 1213120111320 in words is "one trillion, two hundred thirteen billion, one hundred twenty million, one hundred eleven thousand, three hundred twenty".