1012020209881 has 2 divisors, whose sum is σ = 1012020209882. Its totient is φ = 1012020209880.

The previous prime is 1012020209869. The next prime is 1012020209927. The reversal of 1012020209881 is 1889020202101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 983072250000 + 28947959881 = 991500^2 + 170141^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012020209881 - 2¹⁷ = 1012020078809 is a prime.

It is a super-2 number, since 2×1012020209881² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1012020209821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506010104940 + 506010104941.

It is an arithmetic number, because the mean of its divisors is an integer number (506010104941).

Almost surely, 2^{1012020209881} is an apocalyptic number.

It is an amenable number.

1012020209881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012020209881 is an equidigital number, since it uses as much as digits as its factorization.

1012020209881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 34.

The spelling of 1012020209881 in words is "one trillion, twelve billion, twenty million, two hundred nine thousand, eight hundred eighty-one".