20101010211211 has 2 divisors, whose sum is σ = 20101010211212. Its totient is φ = 20101010211210.

The previous prime is 20101010211209. The next prime is 20101010211251. The reversal of 20101010211211 is 11211201010102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20101010211211 - 2¹ = 20101010211209 is a prime.

It is a super-2 number, since 2×20101010211211² (a number of 27 digits) contains 22 as substring.

Together with 20101010211209, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 20101010211191 and 20101010211200.

It is not a weakly prime, because it can be changed into another prime (20101010211251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050505105605 + 10050505105606.

It is an arithmetic number, because the mean of its divisors is an integer number (10050505105606).

Almost surely, 2^{20101010211211} is an apocalyptic number.

20101010211211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20101010211211 is an equidigital number, since it uses as much as digits as its factorization.

20101010211211 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 20101010211211 its reverse (11211201010102), we get a palindrome (31312211221313).

It can be divided in two parts, 201010102 and 11211, that multiplied together give a palindrome (2253524253522).

The spelling of 20101010211211 in words is "twenty trillion, one hundred one billion, ten million, two hundred eleven thousand, two hundred eleven".