1211131042 has 16 divisors (see below), whose sum is σ = 1985904864. Its totient is φ = 549388000.

The previous prime is 1211131013. The next prime is 1211131049. The reversal of 1211131042 is 2401311121.

It is not an unprimeable number, because it can be changed into a prime (1211131049) 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, 45259 + ... + 66862.

It is an arithmetic number, because the mean of its divisors is an integer number (124119054).

Almost surely, 2^1211131042 is an apocalyptic number.

1211131042 is a deficient number, since it is larger than the sum of its proper divisors (774773822).

1211131042 is a wasteful number, since it uses less digits than its factorization.

1211131042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112625.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1211131042 is about 34801.3080501294. The cubic root of 1211131042 is about 1065.9341556506.

Adding to 1211131042 its reverse (2401311121), we get a palindrome (3612442163).

The spelling of 1211131042 in words is "one billion, two hundred eleven million, one hundred thirty-one thousand, forty-two".