20210311121171 has 2 divisors, whose sum is σ = 20210311121172. Its totient is φ = 20210311121170.

The previous prime is 20210311121159. The next prime is 20210311121227. The reversal of 20210311121171 is 17112111301202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20210311121171 - 2⁶ = 20210311121107 is a prime.

It is a super-2 number, since 2×20210311121171² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20210311421171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105155560585 + 10105155560586.

It is an arithmetic number, because the mean of its divisors is an integer number (10105155560586).

Almost surely, 2^{20210311121171} is an apocalyptic number.

20210311121171 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210311121171 is an equidigital number, since it uses as much as digits as its factorization.

20210311121171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 23.

Adding to 20210311121171 its reverse (17112111301202), we get a palindrome (37322422422373).

The spelling of 20210311121171 in words is "twenty trillion, two hundred ten billion, three hundred eleven million, one hundred twenty-one thousand, one hundred seventy-one".