1211201402041 has 2 divisors, whose sum is σ = 1211201402042. Its totient is φ = 1211201402040.

The previous prime is 1211201402017. The next prime is 1211201402071. The reversal of 1211201402041 is 1402041021121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 805992768441 + 405208633600 = 897771^2 + 636560^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211201402041 - 2¹³ = 1211201393849 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211201402071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605600701020 + 605600701021.

It is an arithmetic number, because the mean of its divisors is an integer number (605600701021).

Almost surely, 2^{1211201402041} is an apocalyptic number.

It is an amenable number.

1211201402041 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211201402041 is an equidigital number, since it uses as much as digits as its factorization.

1211201402041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1211201402041 its reverse (1402041021121), we get a palindrome (2613242423162).

The spelling of 1211201402041 in words is "one trillion, two hundred eleven billion, two hundred one million, four hundred two thousand, forty-one".