20210211103081 has 2 divisors, whose sum is σ = 20210211103082. Its totient is φ = 20210211103080.

The previous prime is 20210211103067. The next prime is 20210211103091. The reversal of 20210211103081 is 18030111201202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19295672723856 + 914538379225 = 4392684^2 + 956315^2 .

It is a cyclic number.

It is not a de Polignac number, because 20210211103081 - 2³¹ = 20208063619433 is a prime.

It is a super-2 number, since 2×20210211103081² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20210211103091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105105551540 + 10105105551541.

It is an arithmetic number, because the mean of its divisors is an integer number (10105105551541).

Almost surely, 2^{20210211103081} is an apocalyptic number.

It is an amenable number.

20210211103081 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210211103081 is an equidigital number, since it uses as much as digits as its factorization.

20210211103081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 22.

Adding to 20210211103081 its reverse (18030111201202), we get a palindrome (38240322304283).

The spelling of 20210211103081 in words is "twenty trillion, two hundred ten billion, two hundred eleven million, one hundred three thousand, eighty-one".