1302011220 has 24 divisors (see below), whose sum is σ = 3645631584. Its totient is φ = 347202976.

The previous prime is 1302011189. The next prime is 1302011257. The reversal of 1302011220 is 221102031.

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 = 1302011196 and 1302011205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10850034 + ... + 10850153.

It is an arithmetic number, because the mean of its divisors is an integer number (151901316).

Almost surely, 2^1302011220 is an apocalyptic number.

1302011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1302011220 is an abundant number, since it is smaller than the sum of its proper divisors (2343620364).

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

1302011220 is a wasteful number, since it uses less digits than its factorization.

1302011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21700199 (or 21700197 counting only the distinct ones).

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

The square root of 1302011220 is about 36083.3925788582. The cubic root of 1302011220 is about 1091.9554215724.

Adding to 1302011220 its reverse (221102031), we get a palindrome (1523113251).

The spelling of 1302011220 in words is "one billion, three hundred two million, eleven thousand, two hundred twenty".