1211320022111 has 2 divisors, whose sum is σ = 1211320022112. Its totient is φ = 1211320022110.

The previous prime is 1211320022083. The next prime is 1211320022131. The reversal of 1211320022111 is 1112200231121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211320022111 - 2⁶ = 1211320022047 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1211320022111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211320022131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605660011055 + 605660011056.

It is an arithmetic number, because the mean of its divisors is an integer number (605660011056).

Almost surely, 2^{1211320022111} is an apocalyptic number.

1211320022111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211320022111 is an equidigital number, since it uses as much as digits as its factorization.

1211320022111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1211320022111 its reverse (1112200231121), we get a palindrome (2323520253232).

The spelling of 1211320022111 in words is "one trillion, two hundred eleven billion, three hundred twenty million, twenty-two thousand, one hundred eleven".