1151221270 has 16 divisors (see below), whose sum is σ = 2139043968. Its totient is φ = 445633920.

The previous prime is 1151221189. The next prime is 1151221273. The reversal of 1151221270 is 721221511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151221273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1856499 + ... + 1857118.

It is an arithmetic number, because the mean of its divisors is an integer number (133690248).

Almost surely, 2^1151221270 is an apocalyptic number.

1151221270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1151221270 is a deficient number, since it is larger than the sum of its proper divisors (987822698).

1151221270 is a wasteful number, since it uses less digits than its factorization.

1151221270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3713655.

The product of its (nonzero) digits is 280, while the sum is 22.

The square root of 1151221270 is about 33929.6517812960. The cubic root of 1151221270 is about 1048.0602949547.

Adding to 1151221270 its reverse (721221511), we get a palindrome (1872442781).

The spelling of 1151221270 in words is "one billion, one hundred fifty-one million, two hundred twenty-one thousand, two hundred seventy".