1211441222021 has 2 divisors, whose sum is σ = 1211441222022. Its totient is φ = 1211441222020.

The previous prime is 1211441221997. The next prime is 1211441222077. The reversal of 1211441222021 is 1202221441121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 738888091396 + 472553130625 = 859586^2 + 687425^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211441222021 - 2¹⁸ = 1211440959877 is a prime.

It is a super-3 number, since 3×1211441222021³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211441221021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605720611010 + 605720611011.

It is an arithmetic number, because the mean of its divisors is an integer number (605720611011).

Almost surely, 2^{1211441222021} is an apocalyptic number.

It is an amenable number.

1211441222021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211441222021 is an equidigital number, since it uses as much as digits as its factorization.

1211441222021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 1211441222021 its reverse (1202221441121), we get a palindrome (2413662663142).

The spelling of 1211441222021 in words is "one trillion, two hundred eleven billion, four hundred forty-one million, two hundred twenty-two thousand, twenty-one".