1211401043 has 12 divisors (see below), whose sum is σ = 1255636584. Its totient is φ = 1168675200.

The previous prime is 1211400997. The next prime is 1211401063. The reversal of 1211401043 is 3401041121.

It is a happy number.

It is not a de Polignac number, because 1211401043 - 2⁸ = 1211400787 is a prime.

It is a super-3 number, since 3×1211401043³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211401063) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 337448 + ... + 341018.

It is an arithmetic number, because the mean of its divisors is an integer number (104636382).

Almost surely, 2^1211401043 is an apocalyptic number.

1211401043 is a deficient number, since it is larger than the sum of its proper divisors (44235541).

1211401043 is an equidigital number, since it uses as much as digits as its factorization.

1211401043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3986 (or 3955 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1211401043 is about 34805.1870128577. The cubic root of 1211401043 is about 1066.0133603757.

Adding to 1211401043 its reverse (3401041121), we get a palindrome (4612442164).

The spelling of 1211401043 in words is "one billion, two hundred eleven million, four hundred one thousand, forty-three".