2102011211 has 4 divisors (see below), whose sum is σ = 2212643400. Its totient is φ = 1991379024.

The previous prime is 2102011201. The next prime is 2102011253. The reversal of 2102011211 is 1121102012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2102011211 - 2²⁶ = 2034902347 is a prime.

It is a super-2 number, since 2×2102011211² = 8836902262339373042, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102011192 and 2102011201.

It is not an unprimeable number, because it can be changed into a prime (2102011201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55316066 + ... + 55316103.

It is an arithmetic number, because the mean of its divisors is an integer number (553160850).

Almost surely, 2^2102011211 is an apocalyptic number.

2102011211 is a deficient number, since it is larger than the sum of its proper divisors (110632189).

2102011211 is a wasteful number, since it uses less digits than its factorization.

2102011211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110632188.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 2102011211 is about 45847.6958090589. The cubic root of 2102011211 is about 1280.9878464372.

Adding to 2102011211 its reverse (1121102012), we get a palindrome (3223113223).

The spelling of 2102011211 in words is "two billion, one hundred two million, eleven thousand, two hundred eleven".