1220212111320 has 64 divisors (see below), whose sum is σ = 4067373708000. Its totient is φ = 325389896064.

The previous prime is 1220212111303. The next prime is 1220212111409. The reversal of 1220212111320 is 231112120221.

1220212111320 is a `hidden beast` number, since 1 + 2 + 20 + 212 + 111 + 320 = 666.

It is a super-2 number, since 2×1220212111320² (a number of 25 digits) contains 22 as substring.

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 = 1220212111293 and 1220212111302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 564911935 + ... + 564914094.

Almost surely, 2^{1220212111320} is an apocalyptic number.

1220212111320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220212111320 is an abundant number, since it is smaller than the sum of its proper divisors (2847161596680).

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

1220212111320 is a wasteful number, since it uses less digits than its factorization.

1220212111320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129826049 (or 1129826039 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1220212111320 its reverse (231112120221), we get a palindrome (1451324231541).

The spelling of 1220212111320 in words is "one trillion, two hundred twenty billion, two hundred twelve million, one hundred eleven thousand, three hundred twenty".