1211015043 has 48 divisors (see below), whose sum is σ = 2195182080. Its totient is φ = 651286656.

The previous prime is 1211015041. The next prime is 1211015081. The reversal of 1211015043 is 3405101121.

It is not a de Polignac number, because 1211015043 - 2¹ = 1211015041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211015041) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7978 + ... + 49856.

It is an arithmetic number, because the mean of its divisors is an integer number (45732960).

Almost surely, 2^1211015043 is an apocalyptic number.

1211015043 is a deficient number, since it is larger than the sum of its proper divisors (984167037).

1211015043 is an equidigital number, since it uses as much as digits as its factorization.

1211015043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41918 (or 41906 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1211015043 is about 34799.6414205664. The cubic root of 1211015043 is about 1065.9001237582.

Adding to 1211015043 its reverse (3405101121), we get a palindrome (4616116164).

The spelling of 1211015043 in words is "one billion, two hundred eleven million, fifteen thousand, forty-three".