1021001201081 has 2 divisors, whose sum is σ = 1021001201082. Its totient is φ = 1021001201080.

The previous prime is 1021001201069. The next prime is 1021001201089. The reversal of 1021001201081 is 1801021001201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 795842410000 + 225158791081 = 892100^2 + 474509^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021001201081 is a prime.

It is a super-2 number, since 2×1021001201081² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1021001201089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510500600540 + 510500600541.

It is an arithmetic number, because the mean of its divisors is an integer number (510500600541).

Almost surely, 2^{1021001201081} is an apocalyptic number.

It is an amenable number.

1021001201081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021001201081 is an equidigital number, since it uses as much as digits as its factorization.

1021001201081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1021001201081 its reverse (1801021001201), we get a palindrome (2822022202282).

It can be divided in two parts, 102100120 and 1081, that added together give a palindrome (102101201).

The spelling of 1021001201081 in words is "one trillion, twenty-one billion, one million, two hundred one thousand, eighty-one".