1131202220 has 12 divisors (see below), whose sum is σ = 2375524704. Its totient is φ = 452480880.

The previous prime is 1131202211. The next prime is 1131202229. The reversal of 1131202220 is 222021311.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1131202211) and next prime (1131202229).

It is a junction number, because it is equal to n+sod(n) for n = 1131202195 and 1131202204.

It is not an unprimeable number, because it can be changed into a prime (1131202229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28280036 + ... + 28280075.

It is an arithmetic number, because the mean of its divisors is an integer number (197960392).

Almost surely, 2^1131202220 is an apocalyptic number.

1131202220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131202220 is an abundant number, since it is smaller than the sum of its proper divisors (1244322484).

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

1131202220 is a wasteful number, since it uses less digits than its factorization.

1131202220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56560120 (or 56560118 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1131202220 is about 33633.3498182979. The cubic root of 1131202220 is about 1041.9496895236.

Adding to 1131202220 its reverse (222021311), we get a palindrome (1353223531).

The spelling of 1131202220 in words is "one billion, one hundred thirty-one million, two hundred two thousand, two hundred twenty".