1211022020111 has 2 divisors, whose sum is σ = 1211022020112. Its totient is φ = 1211022020110.

The previous prime is 1211022020101. The next prime is 1211022020119. The reversal of 1211022020111 is 1110202201121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211022020111 - 2¹⁴ = 1211022003727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211022020119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605511010055 + 605511010056.

It is an arithmetic number, because the mean of its divisors is an integer number (605511010056).

Almost surely, 2^{1211022020111} is an apocalyptic number.

1211022020111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211022020111 is an equidigital number, since it uses as much as digits as its factorization.

1211022020111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1211022020111 its reverse (1110202201121), we get a palindrome (2321224221232).

The spelling of 1211022020111 in words is "one trillion, two hundred eleven billion, twenty-two million, twenty thousand, one hundred eleven".