1132121220 has 48 divisors (see below), whose sum is σ = 3176376000. Its totient is φ = 301286016.

The previous prime is 1132121189. The next prime is 1132121231. The reversal of 1132121220 is 221212311.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1132121220.

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, 11034 + ... + 48846.

It is an arithmetic number, because the mean of its divisors is an integer number (66174500).

Almost surely, 2^1132121220 is an apocalyptic number.

1132121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1132121220 is an abundant number, since it is smaller than the sum of its proper divisors (2044254780).

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

1132121220 is a wasteful number, since it uses less digits than its factorization.

1132121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38324 (or 38322 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1132121220 is about 33647.0090795601. The cubic root of 1132121220 is about 1042.2317765977.

Adding to 1132121220 its reverse (221212311), we get a palindrome (1353333531).

The spelling of 1132121220 in words is "one billion, one hundred thirty-two million, one hundred twenty-one thousand, two hundred twenty".