1202121020081 has 2 divisors, whose sum is σ = 1202121020082. Its totient is φ = 1202121020080.

The previous prime is 1202121020071. The next prime is 1202121020167. The reversal of 1202121020081 is 1800201212021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1130906760481 + 71214259600 = 1063441^2 + 266860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1202121020081 is a prime.

It is a super-2 number, since 2×1202121020081² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1202121020021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601060510040 + 601060510041.

It is an arithmetic number, because the mean of its divisors is an integer number (601060510041).

Almost surely, 2^{1202121020081} is an apocalyptic number.

It is an amenable number.

1202121020081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202121020081 is an equidigital number, since it uses as much as digits as its factorization.

1202121020081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 20.

The spelling of 1202121020081 in words is "one trillion, two hundred two billion, one hundred twenty-one million, twenty thousand, eighty-one".