211211122021101 has 24 divisors (see below), whose sum is σ = 326951176755840. Its totient is φ = 131045208487776.

The previous prime is 211211122021093. The next prime is 211211122021127. The reversal of 211211122021101 is 101120221112112.

It is a happy number.

211211122021101 is a `hidden beast` number, since 21 + 1 + 211 + 1 + 220 + 211 + 0 + 1 = 666.

It is not a de Polignac number, because 211211122021101 - 2³ = 211211122021093 is a prime.

It is a super-2 number, since 2×211211122021101² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211211122021201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13788419161 + ... + 13788434478.

It is an arithmetic number, because the mean of its divisors is an integer number (13622965698160).

Almost surely, 2^{211211122021101} is an apocalyptic number.

It is an amenable number.

211211122021101 is a deficient number, since it is larger than the sum of its proper divisors (115740054734739).

211211122021101 is a wasteful number, since it uses less digits than its factorization.

211211122021101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27576853705 (or 27576853702 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 211211122021101 its reverse (101120221112112), we get a palindrome (312331343133213).

The spelling of 211211122021101 in words is "two hundred eleven trillion, two hundred eleven billion, one hundred twenty-two million, twenty-one thousand, one hundred one".