1211101142 has 16 divisors (see below), whose sum is σ = 1868216400. Its totient is φ = 588593280.

The previous prime is 1211101139. The next prime is 1211101153. The reversal of 1211101142 is 2411011121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47159 + ... + 68162.

It is an arithmetic number, because the mean of its divisors is an integer number (116763525).

Almost surely, 2^1211101142 is an apocalyptic number.

1211101142 is a deficient number, since it is larger than the sum of its proper divisors (657115258).

1211101142 is a wasteful number, since it uses less digits than its factorization.

1211101142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115471.

The product of its (nonzero) digits is 16, while the sum is 14.

The square root of 1211101142 is about 34800.8784659238. The cubic root of 1211101142 is about 1065.9253837692.

Adding to 1211101142 its reverse (2411011121), we get a palindrome (3622112263).

The spelling of 1211101142 in words is "one billion, two hundred eleven million, one hundred one thousand, one hundred forty-two".