1213002220 has 24 divisors (see below), whose sum is σ = 2609435808. Its totient is φ = 473366400.

The previous prime is 1213002209. The next prime is 1213002239. The reversal of 1213002220 is 222003121.

It is a self number, because there is not a number n which added to its sum of digits gives 1213002220.

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, 738816 + ... + 740455.

It is an arithmetic number, because the mean of its divisors is an integer number (108726492).

Almost surely, 2^1213002220 is an apocalyptic number.

1213002220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213002220 is an abundant number, since it is smaller than the sum of its proper divisors (1396433588).

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

1213002220 is a wasteful number, since it uses less digits than its factorization.

1213002220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1479321 (or 1479319 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1213002220 is about 34828.1814052930. The cubic root of 1213002220 is about 1066.4828235677.

Adding to 1213002220 its reverse (222003121), we get a palindrome (1435005341).

Subtracting from 1213002220 its reverse (222003121), we obtain a palindrome (990999099).

The spelling of 1213002220 in words is "one billion, two hundred thirteen million, two thousand, two hundred twenty".