20101221110071 has 2 divisors, whose sum is σ = 20101221110072. Its totient is φ = 20101221110070.

The previous prime is 20101221109999. The next prime is 20101221110101. The reversal of 20101221110071 is 17001112210102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20101221110071 - 2³⁵ = 20066861371703 is a prime.

It is a super-3 number, since 3×20101221110071³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20101221410071) 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, 10050610555035 + 10050610555036.

It is an arithmetic number, because the mean of its divisors is an integer number (10050610555036).

Almost surely, 2^{20101221110071} is an apocalyptic number.

20101221110071 is a deficient number, since it is larger than the sum of its proper divisors (1).

20101221110071 is an equidigital number, since it uses as much as digits as its factorization.

20101221110071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 19.

Adding to 20101221110071 its reverse (17001112210102), we get a palindrome (37102333320173).

The spelling of 20101221110071 in words is "twenty trillion, one hundred one billion, two hundred twenty-one million, one hundred ten thousand, seventy-one".