1151221042 has 16 divisors (see below), whose sum is σ = 1770205752. Its totient is φ = 561172480.

The previous prime is 1151221037. The next prime is 1151221063. The reversal of 1151221042 is 2401221511.

It can be written as a sum of positive squares in 4 ways, for example, as 1084977721 + 66243321 = 32939^2 + 8139^2 .

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, 135018 + ... + 143290.

Almost surely, 2^1151221042 is an apocalyptic number.

1151221042 is a deficient number, since it is larger than the sum of its proper divisors (618984710).

1151221042 is a wasteful number, since it uses less digits than its factorization.

1151221042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10013.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 1151221042 is about 33929.6484214028. The cubic root of 1151221042 is about 1048.0602257651.

Adding to 1151221042 its reverse (2401221511), we get a palindrome (3552442553).

The spelling of 1151221042 in words is "one billion, one hundred fifty-one million, two hundred twenty-one thousand, forty-two".