2101213211 has 4 divisors (see below), whose sum is σ = 2211803400. Its totient is φ = 1990623024.

The previous prime is 2101213123. The next prime is 2101213237. The reversal of 2101213211 is 1123121012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2101213211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101213271) 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, 55295066 + ... + 55295103.

It is an arithmetic number, because the mean of its divisors is an integer number (552950850).

Almost surely, 2^2101213211 is an apocalyptic number.

2101213211 is a deficient number, since it is larger than the sum of its proper divisors (110590189).

2101213211 is a wasteful number, since it uses less digits than its factorization.

2101213211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110590188.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 2101213211 is about 45838.9922555023. The cubic root of 2101213211 is about 1280.8257227083.

Adding to 2101213211 its reverse (1123121012), we get a palindrome (3224334223).

The spelling of 2101213211 in words is "two billion, one hundred one million, two hundred thirteen thousand, two hundred eleven".