1020121101101 has 2 divisors, whose sum is σ = 1020121101102. Its totient is φ = 1020121101100.

The previous prime is 1020121101059. The next prime is 1020121101199. The reversal of 1020121101101 is 1011011210201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 734233051876 + 285888049225 = 856874^2 + 534685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020121101101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020121121101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510060550550 + 510060550551.

It is an arithmetic number, because the mean of its divisors is an integer number (510060550551).

Almost surely, 2^{1020121101101} is an apocalyptic number.

It is an amenable number.

1020121101101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020121101101 is an equidigital number, since it uses as much as digits as its factorization.

1020121101101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1020121101101 its reverse (1011011210201), we get a palindrome (2031132311302).

The spelling of 1020121101101 in words is "one trillion, twenty billion, one hundred twenty-one million, one hundred one thousand, one hundred one".