1320101220 has 48 divisors (see below), whose sum is σ = 3774935808. Its totient is φ = 344536320.

The previous prime is 1320101219. The next prime is 1320101309. The reversal of 1320101220 is 221010231.

It is a super-3 number, since 3×1320101220³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1320101196 and 1320101205.

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, 231241 + ... + 236880.

It is an arithmetic number, because the mean of its divisors is an integer number (78644496).

Almost surely, 2^1320101220 is an apocalyptic number.

1320101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320101220 is an abundant number, since it is smaller than the sum of its proper divisors (2454834588).

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

1320101220 is a wasteful number, since it uses less digits than its factorization.

1320101220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468180 (or 468178 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1320101220 is about 36333.1972168704. The cubic root of 1320101220 is about 1096.9893487658.

Adding to 1320101220 its reverse (221010231), we get a palindrome (1541111451).

The spelling of 1320101220 in words is "one billion, three hundred twenty million, one hundred one thousand, two hundred twenty".