211221201041 has 2 divisors, whose sum is σ = 211221201042. Its totient is φ = 211221201040.

The previous prime is 211221200977. The next prime is 211221201047. The reversal of 211221201041 is 140102122112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146481487441 + 64739713600 = 382729^2 + 254440^2 .

It is a cyclic number.

It is not a de Polignac number, because 211221201041 - 2⁶ = 211221200977 is a prime.

It is a super-2 number, since 2×211221201041² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211221201047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105610600520 + 105610600521.

It is an arithmetic number, because the mean of its divisors is an integer number (105610600521).

Almost surely, 2^211221201041 is an apocalyptic number.

It is an amenable number.

211221201041 is a deficient number, since it is larger than the sum of its proper divisors (1).

211221201041 is an equidigital number, since it uses as much as digits as its factorization.

211221201041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 211221201041 its reverse (140102122112), we get a palindrome (351323323153).

The spelling of 211221201041 in words is "two hundred eleven billion, two hundred twenty-one million, two hundred one thousand, forty-one".