1022021210981 has 2 divisors, whose sum is σ = 1022021210982. Its totient is φ = 1022021210980.

The previous prime is 1022021210963. The next prime is 1022021211031. The reversal of 1022021210981 is 1890121202201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 798996425956 + 223024785025 = 893866^2 + 472255^2 .

It is an emirp because it is prime and its reverse (1890121202201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1022021210981 - 2²² = 1022017016677 is a prime.

It is a super-2 number, since 2×1022021210981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1022021210911) 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, 511010605490 + 511010605491.

It is an arithmetic number, because the mean of its divisors is an integer number (511010605491).

Almost surely, 2^{1022021210981} is an apocalyptic number.

It is an amenable number.

1022021210981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022021210981 is an equidigital number, since it uses as much as digits as its factorization.

1022021210981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 29.

The spelling of 1022021210981 in words is "one trillion, twenty-two billion, twenty-one million, two hundred ten thousand, nine hundred eighty-one".