1101202121081 has 2 divisors, whose sum is σ = 1101202121082. Its totient is φ = 1101202121080.

The previous prime is 1101202121053. The next prime is 1101202121101. The reversal of 1101202121081 is 1801212021011.

It is a happy number.

It is an a-pointer prime, because the next prime (1101202121101) can be obtained adding 1101202121081 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1100495412025 + 706709056 = 1049045^2 + 26584^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1101202121081 is a prime.

It is a super-3 number, since 3×1101202121081³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (1101202021081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550601060540 + 550601060541.

It is an arithmetic number, because the mean of its divisors is an integer number (550601060541).

Almost surely, 2^{1101202121081} is an apocalyptic number.

It is an amenable number.

1101202121081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101202121081 is an equidigital number, since it uses as much as digits as its factorization.

1101202121081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 1101202121081 its reverse (1801212021011), we get a palindrome (2902414142092).

The spelling of 1101202121081 in words is "one trillion, one hundred one billion, two hundred two million, one hundred twenty-one thousand, eighty-one".