20210101211101 has 2 divisors, whose sum is σ = 20210101211102. Its totient is φ = 20210101211100.

The previous prime is 20210101211099. The next prime is 20210101211117. The reversal of 20210101211101 is 10111210101202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19680846416100 + 529254795001 = 4436310^2 + 727499^2 .

It is a cyclic number.

It is not a de Polignac number, because 20210101211101 - 2¹ = 20210101211099 is a prime.

It is a super-2 number, since 2×20210101211101² (a number of 27 digits) contains 22 as substring.

Together with 20210101211099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20210101011101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105050605550 + 10105050605551.

It is an arithmetic number, because the mean of its divisors is an integer number (10105050605551).

Almost surely, 2^{20210101211101} is an apocalyptic number.

It is an amenable number.

20210101211101 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210101211101 is an equidigital number, since it uses as much as digits as its factorization.

20210101211101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20210101211101 its reverse (10111210101202), we get a palindrome (30321311312303).

The spelling of 20210101211101 in words is "twenty trillion, two hundred ten billion, one hundred one million, two hundred eleven thousand, one hundred one".