2111121221101 has 2 divisors, whose sum is σ = 2111121221102. Its totient is φ = 2111121221100.

The previous prime is 2111121221023. The next prime is 2111121221141. The reversal of 2111121221101 is 1011221211112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1973606332201 + 137514888900 = 1404851^2 + 370830^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111121221101 - 2¹⁹ = 2111120696813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111121221141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055560610550 + 1055560610551.

It is an arithmetic number, because the mean of its divisors is an integer number (1055560610551).

Almost surely, 2^{2111121221101} is an apocalyptic number.

It is an amenable number.

2111121221101 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111121221101 is an equidigital number, since it uses as much as digits as its factorization.

2111121221101 is an evil number, because the sum of its binary digits is even.

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

Adding to 2111121221101 its reverse (1011221211112), we get a palindrome (3122342432213).

The spelling of 2111121221101 in words is "two trillion, one hundred eleven billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred one".