1211130042 has 16 divisors (see below), whose sum is σ = 2426106432. Its totient is φ = 403068960.

The previous prime is 1211130023. The next prime is 1211130049. The reversal of 1211130042 is 2400311121.

It is not an unprimeable number, because it can be changed into a prime (1211130049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156163 + ... + 163734.

It is an arithmetic number, because the mean of its divisors is an integer number (151631652).

Almost surely, 2^1211130042 is an apocalyptic number.

1211130042 is an abundant number, since it is smaller than the sum of its proper divisors (1214976390).

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

1211130042 is a wasteful number, since it uses less digits than its factorization.

1211130042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320533.

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

The square root of 1211130042 is about 34801.2936828504. The cubic root of 1211130042 is about 1065.9338622790.

Adding to 1211130042 its reverse (2400311121), we get a palindrome (3611441163).

The spelling of 1211130042 in words is "one billion, two hundred eleven million, one hundred thirty thousand, forty-two".