1211012443 has 8 divisors (see below), whose sum is σ = 1295648720. Its totient is φ = 1128466080.

The previous prime is 1211012441. The next prime is 1211012461. The reversal of 1211012443 is 3442101121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1211012443 - 2¹ = 1211012441 is a prime.

It is a super-2 number, since 2×1211012443² = 2933102274201656498, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1211012443.

It is not an unprimeable number, because it can be changed into a prime (1211012441) 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, 521280 + ... + 523597.

It is an arithmetic number, because the mean of its divisors is an integer number (161956090).

Almost surely, 2^1211012443 is an apocalyptic number.

1211012443 is a deficient number, since it is larger than the sum of its proper divisors (84636277).

1211012443 is a wasteful number, since it uses less digits than its factorization.

1211012443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044957.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1211012443 is about 34799.6040638396. The cubic root of 1211012443 is about 1065.8993609429.

Adding to 1211012443 its reverse (3442101121), we get a palindrome (4653113564).

The spelling of 1211012443 in words is "one billion, two hundred eleven million, twelve thousand, four hundred forty-three".