1211201041 has 2 divisors, whose sum is σ = 1211201042. Its totient is φ = 1211201040.

The previous prime is 1211201039. The next prime is 1211201051. The reversal of 1211201041 is 1401021121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1015760641 + 195440400 = 31871^2 + 13980^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211201041 - 2¹ = 1211201039 is a prime.

Together with 1211201039, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1211201011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605600520 + 605600521.

It is an arithmetic number, because the mean of its divisors is an integer number (605600521).

Almost surely, 2^1211201041 is an apocalyptic number.

It is an amenable number.

1211201041 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211201041 is an equidigital number, since it uses as much as digits as its factorization.

1211201041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1211201041 is about 34802.3137305553. The cubic root of 1211201041 is about 1065.9546909698.

Adding to 1211201041 its reverse (1401021121), we get a palindrome (2612222162).

The spelling of 1211201041 in words is "one billion, two hundred eleven million, two hundred one thousand, forty-one".