1011211211201 has 2 divisors, whose sum is σ = 1011211211202. Its totient is φ = 1011211211200.

The previous prime is 1011211211141. The next prime is 1011211211207. The reversal of 1011211211201 is 1021121121101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 864154300801 + 147056910400 = 929599^2 + 383480^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011211211201 - 2¹⁴ = 1011211194817 is a prime.

It is a super-2 number, since 2×1011211211201² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1011211211207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505605605600 + 505605605601.

It is an arithmetic number, because the mean of its divisors is an integer number (505605605601).

Almost surely, 2^{1011211211201} is an apocalyptic number.

It is an amenable number.

1011211211201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011211211201 is an equidigital number, since it uses as much as digits as its factorization.

1011211211201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1011211211201 its reverse (1021121121101), we get a palindrome (2032332332302).

It can be divided in two parts, 10 and 11211211201, that added together give a palindrome (11211211211).

The spelling of 1011211211201 in words is "one trillion, eleven billion, two hundred eleven million, two hundred eleven thousand, two hundred one".