1220151140 has 24 divisors (see below), whose sum is σ = 2759419320. Its totient is φ = 450517248.

The previous prime is 1220151131. The next prime is 1220151143. The reversal of 1220151140 is 411510221.

It can be written as a sum of positive squares in 4 ways, for example, as 21883684 + 1198267456 = 4678^2 + 34616^2 .

It is not an unprimeable number, because it can be changed into a prime (1220151143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2346185 + ... + 2346704.

It is an arithmetic number, because the mean of its divisors is an integer number (114975805).

Almost surely, 2^1220151140 is an apocalyptic number.

1220151140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220151140 is an abundant number, since it is smaller than the sum of its proper divisors (1539268180).

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

1220151140 is a wasteful number, since it uses less digits than its factorization.

1220151140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4692911 (or 4692909 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 1220151140 is about 34930.6618889479. The cubic root of 1220151140 is about 1068.5738533496.

Adding to 1220151140 its reverse (411510221), we get a palindrome (1631661361).

The spelling of 1220151140 in words is "one billion, two hundred twenty million, one hundred fifty-one thousand, one hundred forty".